da7d7b9c86
MFC after: 3 days
1984 lines
48 KiB
C
1984 lines
48 KiB
C
/*
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* Copyright (c) 2000-2006, 2008, 2009, 2011, 2013 Proofpoint, Inc. and its suppliers.
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* All rights reserved.
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*
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* By using this file, you agree to the terms and conditions set
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* forth in the LICENSE file which can be found at the top level of
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* the sendmail distribution.
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*
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*/
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#include <sendmail.h>
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SM_RCSID("@(#)$Id: tls.c,v 8.127 2013-11-27 02:51:11 gshapiro Exp $")
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#if STARTTLS
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# include <openssl/err.h>
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# include <openssl/bio.h>
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# include <openssl/pem.h>
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# ifndef HASURANDOMDEV
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# include <openssl/rand.h>
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# endif /* ! HASURANDOMDEV */
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# if !TLS_NO_RSA
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static RSA *rsa_tmp = NULL; /* temporary RSA key */
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static RSA *tmp_rsa_key __P((SSL *, int, int));
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# endif /* !TLS_NO_RSA */
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# if !defined(OPENSSL_VERSION_NUMBER) || OPENSSL_VERSION_NUMBER < 0x00907000L
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static int tls_verify_cb __P((X509_STORE_CTX *));
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# else /* !defined() || OPENSSL_VERSION_NUMBER < 0x00907000L */
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static int tls_verify_cb __P((X509_STORE_CTX *, void *));
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# endif /* !defined() || OPENSSL_VERSION_NUMBER < 0x00907000L */
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# if OPENSSL_VERSION_NUMBER > 0x00907000L
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static int x509_verify_cb __P((int, X509_STORE_CTX *));
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# endif /* OPENSSL_VERSION_NUMBER > 0x00907000L */
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# if !defined(OPENSSL_VERSION_NUMBER) || OPENSSL_VERSION_NUMBER < 0x00907000L
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# define CONST097
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# else /* !defined() || OPENSSL_VERSION_NUMBER < 0x00907000L */
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# define CONST097 const
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# endif /* !defined() || OPENSSL_VERSION_NUMBER < 0x00907000L */
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static void apps_ssl_info_cb __P((CONST097 SSL *, int , int));
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static bool tls_ok_f __P((char *, char *, int));
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static bool tls_safe_f __P((char *, long, bool));
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static int tls_verify_log __P((int, X509_STORE_CTX *, const char *));
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# if !NO_DH
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static DH *get_dh512 __P((void));
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static unsigned char dh512_p[] =
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{
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0xDA,0x58,0x3C,0x16,0xD9,0x85,0x22,0x89,0xD0,0xE4,0xAF,0x75,
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0x6F,0x4C,0xCA,0x92,0xDD,0x4B,0xE5,0x33,0xB8,0x04,0xFB,0x0F,
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0xED,0x94,0xEF,0x9C,0x8A,0x44,0x03,0xED,0x57,0x46,0x50,0xD3,
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0x69,0x99,0xDB,0x29,0xD7,0x76,0x27,0x6B,0xA2,0xD3,0xD4,0x12,
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0xE2,0x18,0xF4,0xDD,0x1E,0x08,0x4C,0xF6,0xD8,0x00,0x3E,0x7C,
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0x47,0x74,0xE8,0x33
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};
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static unsigned char dh512_g[] =
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{
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0x02
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};
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static DH *
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get_dh512()
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{
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DH *dh = NULL;
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if ((dh = DH_new()) == NULL)
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return NULL;
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dh->p = BN_bin2bn(dh512_p, sizeof(dh512_p), NULL);
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dh->g = BN_bin2bn(dh512_g, sizeof(dh512_g), NULL);
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if ((dh->p == NULL) || (dh->g == NULL))
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return NULL;
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return dh;
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}
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# if 0
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This is the data from which the C code has been generated:
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-----BEGIN DH PARAMETERS-----
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MIIBCAKCAQEArDcgcLpxEksQHPlolRKCUJ2szKRziseWV9cUSQNZGxoGw7KkROz4
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HF9QSbg5axyNIG+QbZYtx0jp3l6/GWq1dLOj27yZkgYgaYgFrvKPiZ2jJ5xETQVH
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UpZwbjRcyjyWkWYJVsx1aF4F/iY4kT0n/+iGEoimI3C9V3KXTJ2S6jIkyJ6M/CrN
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EtrDynMlUMGlc7S1ouXVOTrtKeqy3S2L9eBLxVI+sChEijGIfELupdVeXihK006p
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MgnABPDbkTx6OOtYmSZaGQX+OLW2FPmwvcrzgCz9t9cAsuUcBZv1LeHEqZZttyLU
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oK0jjSXgFyeU4/NfyA+zuNeWzUL6bHmigwIBAg==
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-----END DH PARAMETERS-----
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# endif /* 0 */
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static DH *
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get_dh2048()
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{
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static unsigned char dh2048_p[]={
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0xAC,0x37,0x20,0x70,0xBA,0x71,0x12,0x4B,0x10,0x1C,0xF9,0x68,
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0x95,0x12,0x82,0x50,0x9D,0xAC,0xCC,0xA4,0x73,0x8A,0xC7,0x96,
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0x57,0xD7,0x14,0x49,0x03,0x59,0x1B,0x1A,0x06,0xC3,0xB2,0xA4,
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0x44,0xEC,0xF8,0x1C,0x5F,0x50,0x49,0xB8,0x39,0x6B,0x1C,0x8D,
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0x20,0x6F,0x90,0x6D,0x96,0x2D,0xC7,0x48,0xE9,0xDE,0x5E,0xBF,
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0x19,0x6A,0xB5,0x74,0xB3,0xA3,0xDB,0xBC,0x99,0x92,0x06,0x20,
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0x69,0x88,0x05,0xAE,0xF2,0x8F,0x89,0x9D,0xA3,0x27,0x9C,0x44,
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0x4D,0x05,0x47,0x52,0x96,0x70,0x6E,0x34,0x5C,0xCA,0x3C,0x96,
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0x91,0x66,0x09,0x56,0xCC,0x75,0x68,0x5E,0x05,0xFE,0x26,0x38,
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0x91,0x3D,0x27,0xFF,0xE8,0x86,0x12,0x88,0xA6,0x23,0x70,0xBD,
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0x57,0x72,0x97,0x4C,0x9D,0x92,0xEA,0x32,0x24,0xC8,0x9E,0x8C,
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0xFC,0x2A,0xCD,0x12,0xDA,0xC3,0xCA,0x73,0x25,0x50,0xC1,0xA5,
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0x73,0xB4,0xB5,0xA2,0xE5,0xD5,0x39,0x3A,0xED,0x29,0xEA,0xB2,
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0xDD,0x2D,0x8B,0xF5,0xE0,0x4B,0xC5,0x52,0x3E,0xB0,0x28,0x44,
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0x8A,0x31,0x88,0x7C,0x42,0xEE,0xA5,0xD5,0x5E,0x5E,0x28,0x4A,
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0xD3,0x4E,0xA9,0x32,0x09,0xC0,0x04,0xF0,0xDB,0x91,0x3C,0x7A,
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0x38,0xEB,0x58,0x99,0x26,0x5A,0x19,0x05,0xFE,0x38,0xB5,0xB6,
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0x14,0xF9,0xB0,0xBD,0xCA,0xF3,0x80,0x2C,0xFD,0xB7,0xD7,0x00,
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0xB2,0xE5,0x1C,0x05,0x9B,0xF5,0x2D,0xE1,0xC4,0xA9,0x96,0x6D,
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0xB7,0x22,0xD4,0xA0,0xAD,0x23,0x8D,0x25,0xE0,0x17,0x27,0x94,
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0xE3,0xF3,0x5F,0xC8,0x0F,0xB3,0xB8,0xD7,0x96,0xCD,0x42,0xFA,
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0x6C,0x79,0xA2,0x83,
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};
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static unsigned char dh2048_g[]={ 0x02, };
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DH *dh;
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if ((dh=DH_new()) == NULL)
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return(NULL);
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dh->p=BN_bin2bn(dh2048_p,sizeof(dh2048_p),NULL);
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dh->g=BN_bin2bn(dh2048_g,sizeof(dh2048_g),NULL);
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if ((dh->p == NULL) || (dh->g == NULL))
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{
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DH_free(dh);
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return(NULL);
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}
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return(dh);
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}
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# endif /* !NO_DH */
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/*
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** TLS_RAND_INIT -- initialize STARTTLS random generator
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**
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** Parameters:
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** randfile -- name of file with random data
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** logl -- loglevel
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**
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** Returns:
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** success/failure
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**
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** Side Effects:
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** initializes PRNG for tls library.
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*/
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# define MIN_RAND_BYTES 128 /* 1024 bits */
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# define RF_OK 0 /* randfile OK */
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# define RF_MISS 1 /* randfile == NULL || *randfile == '\0' */
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# define RF_UNKNOWN 2 /* unknown prefix for randfile */
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# define RI_NONE 0 /* no init yet */
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# define RI_SUCCESS 1 /* init was successful */
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# define RI_FAIL 2 /* init failed */
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static bool tls_rand_init __P((char *, int));
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static bool
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tls_rand_init(randfile, logl)
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char *randfile;
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int logl;
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{
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# ifndef HASURANDOMDEV
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/* not required if /dev/urandom exists, OpenSSL does it internally */
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bool ok;
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int randdef;
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static int done = RI_NONE;
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/*
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** initialize PRNG
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*/
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/* did we try this before? if yes: return old value */
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if (done != RI_NONE)
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return done == RI_SUCCESS;
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/* set default values */
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ok = false;
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done = RI_FAIL;
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randdef = (randfile == NULL || *randfile == '\0') ? RF_MISS : RF_OK;
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# if EGD
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if (randdef == RF_OK && sm_strncasecmp(randfile, "egd:", 4) == 0)
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{
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randfile += 4;
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if (RAND_egd(randfile) < 0)
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{
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sm_syslog(LOG_WARNING, NOQID,
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"STARTTLS: RAND_egd(%s) failed: random number generator not seeded",
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randfile);
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}
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else
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ok = true;
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}
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else
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# endif /* EGD */
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if (randdef == RF_OK && sm_strncasecmp(randfile, "file:", 5) == 0)
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{
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int fd;
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long sff;
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struct stat st;
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randfile += 5;
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sff = SFF_SAFEDIRPATH | SFF_NOWLINK
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| SFF_NOGWFILES | SFF_NOWWFILES
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| SFF_NOGRFILES | SFF_NOWRFILES
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| SFF_MUSTOWN | SFF_ROOTOK | SFF_OPENASROOT;
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if (DontLockReadFiles)
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sff |= SFF_NOLOCK;
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if ((fd = safeopen(randfile, O_RDONLY, 0, sff)) >= 0)
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{
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if (fstat(fd, &st) < 0)
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{
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if (LogLevel > logl)
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sm_syslog(LOG_ERR, NOQID,
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"STARTTLS: can't fstat(%s)",
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randfile);
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}
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else
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{
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bool use, problem;
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use = true;
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problem = false;
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/* max. age of file: 10 minutes */
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if (st.st_mtime + 600 < curtime())
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{
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use = bitnset(DBS_INSUFFICIENTENTROPY,
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DontBlameSendmail);
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problem = true;
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if (LogLevel > logl)
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sm_syslog(LOG_ERR, NOQID,
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"STARTTLS: RandFile %s too old: %s",
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randfile,
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use ? "unsafe" :
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"unusable");
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}
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if (use && st.st_size < MIN_RAND_BYTES)
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{
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use = bitnset(DBS_INSUFFICIENTENTROPY,
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DontBlameSendmail);
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problem = true;
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if (LogLevel > logl)
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sm_syslog(LOG_ERR, NOQID,
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"STARTTLS: size(%s) < %d: %s",
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randfile,
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MIN_RAND_BYTES,
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use ? "unsafe" :
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"unusable");
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}
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if (use)
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ok = RAND_load_file(randfile, -1) >=
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MIN_RAND_BYTES;
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if (use && !ok)
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{
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if (LogLevel > logl)
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sm_syslog(LOG_WARNING, NOQID,
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"STARTTLS: RAND_load_file(%s) failed: random number generator not seeded",
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randfile);
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}
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if (problem)
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ok = false;
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}
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if (ok || bitnset(DBS_INSUFFICIENTENTROPY,
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DontBlameSendmail))
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{
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/* add this even if fstat() failed */
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RAND_seed((void *) &st, sizeof(st));
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}
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(void) close(fd);
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}
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else
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{
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if (LogLevel > logl)
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sm_syslog(LOG_WARNING, NOQID,
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"STARTTLS: Warning: safeopen(%s) failed",
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randfile);
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}
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}
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else if (randdef == RF_OK)
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{
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if (LogLevel > logl)
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sm_syslog(LOG_WARNING, NOQID,
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"STARTTLS: Error: no proper random file definition %s",
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randfile);
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randdef = RF_UNKNOWN;
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}
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if (randdef == RF_MISS)
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{
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if (LogLevel > logl)
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sm_syslog(LOG_WARNING, NOQID,
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"STARTTLS: Error: missing random file definition");
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}
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if (!ok && bitnset(DBS_INSUFFICIENTENTROPY, DontBlameSendmail))
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{
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int i;
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long r;
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unsigned char buf[MIN_RAND_BYTES];
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/* assert((MIN_RAND_BYTES % sizeof(long)) == 0); */
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for (i = 0; i <= sizeof(buf) - sizeof(long); i += sizeof(long))
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{
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r = get_random();
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(void) memcpy(buf + i, (void *) &r, sizeof(long));
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}
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RAND_seed(buf, sizeof(buf));
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if (LogLevel > logl)
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sm_syslog(LOG_WARNING, NOQID,
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"STARTTLS: Warning: random number generator not properly seeded");
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ok = true;
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}
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done = ok ? RI_SUCCESS : RI_FAIL;
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return ok;
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# else /* ! HASURANDOMDEV */
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return true;
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# endif /* ! HASURANDOMDEV */
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}
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/*
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** INIT_TLS_LIBRARY -- Calls functions which setup TLS library for global use.
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**
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** Parameters:
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** fipsmode -- use FIPS?
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**
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** Returns:
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** succeeded?
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*/
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bool
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init_tls_library(fipsmode)
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bool fipsmode;
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{
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bool bv;
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/* basic TLS initialization, ignore result for now */
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SSL_library_init();
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SSL_load_error_strings();
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OpenSSL_add_all_algorithms();
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# if 0
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/* this is currently a macro for SSL_library_init */
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SSLeay_add_ssl_algorithms();
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# endif /* 0 */
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bv = tls_rand_init(RandFile, 7);
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# if _FFR_FIPSMODE
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if (bv && fipsmode)
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{
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if (!FIPS_mode_set(1))
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{
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unsigned long err;
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err = ERR_get_error();
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if (LogLevel > 0)
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sm_syslog(LOG_ERR, NOQID,
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"STARTTLS=init, FIPSMode=%s",
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ERR_error_string(err, NULL));
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return false;
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}
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else
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{
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if (LogLevel > 9)
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sm_syslog(LOG_INFO, NOQID,
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"STARTTLS=init, FIPSMode=ok");
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}
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}
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#endif /* _FFR_FIPSMODE */
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if (bv && CertFingerprintAlgorithm != NULL)
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{
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const EVP_MD *md;
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md = EVP_get_digestbyname(CertFingerprintAlgorithm);
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if (NULL == md)
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{
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bv = false;
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if (LogLevel > 0)
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sm_syslog(LOG_ERR, NOQID,
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"STARTTLS=init, CertFingerprintAlgorithm=%s, status=invalid"
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, CertFingerprintAlgorithm);
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}
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else
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EVP_digest = md;
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}
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return bv;
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}
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/*
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** TLS_SET_VERIFY -- request client certificate?
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**
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** Parameters:
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** ctx -- TLS context
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** ssl -- TLS structure
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** vrfy -- request certificate?
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**
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** Returns:
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** none.
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**
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** Side Effects:
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** Sets verification state for TLS
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**
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# if TLS_VRFY_PER_CTX
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** Notice:
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** This is per TLS context, not per TLS structure;
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** the former is global, the latter per connection.
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** It would be nice to do this per connection, but this
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** doesn't work in the current TLS libraries :-(
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# endif * TLS_VRFY_PER_CTX *
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*/
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void
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tls_set_verify(ctx, ssl, vrfy)
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SSL_CTX *ctx;
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SSL *ssl;
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bool vrfy;
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{
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# if !TLS_VRFY_PER_CTX
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SSL_set_verify(ssl, vrfy ? SSL_VERIFY_PEER : SSL_VERIFY_NONE, NULL);
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# else /* !TLS_VRFY_PER_CTX */
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SSL_CTX_set_verify(ctx, vrfy ? SSL_VERIFY_PEER : SSL_VERIFY_NONE,
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NULL);
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# endif /* !TLS_VRFY_PER_CTX */
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}
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/*
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** status in initialization
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** these flags keep track of the status of the initialization
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** i.e., whether a file exists (_EX) and whether it can be used (_OK)
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** [due to permissions]
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*/
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# define TLS_S_NONE 0x00000000 /* none yet */
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# define TLS_S_CERT_EX 0x00000001 /* cert file exists */
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# define TLS_S_CERT_OK 0x00000002 /* cert file is ok */
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# define TLS_S_KEY_EX 0x00000004 /* key file exists */
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# define TLS_S_KEY_OK 0x00000008 /* key file is ok */
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# define TLS_S_CERTP_EX 0x00000010 /* CA cert path exists */
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# define TLS_S_CERTP_OK 0x00000020 /* CA cert path is ok */
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# define TLS_S_CERTF_EX 0x00000040 /* CA cert file exists */
|
|
# define TLS_S_CERTF_OK 0x00000080 /* CA cert file is ok */
|
|
# define TLS_S_CRLF_EX 0x00000100 /* CRL file exists */
|
|
# define TLS_S_CRLF_OK 0x00000200 /* CRL file is ok */
|
|
|
|
# define TLS_S_CERT2_EX 0x00001000 /* 2nd cert file exists */
|
|
# define TLS_S_CERT2_OK 0x00002000 /* 2nd cert file is ok */
|
|
# define TLS_S_KEY2_EX 0x00004000 /* 2nd key file exists */
|
|
# define TLS_S_KEY2_OK 0x00008000 /* 2nd key file is ok */
|
|
|
|
# define TLS_S_DH_OK 0x00200000 /* DH cert is ok */
|
|
# define TLS_S_DHPAR_EX 0x00400000 /* DH param file exists */
|
|
# define TLS_S_DHPAR_OK 0x00800000 /* DH param file is ok to use */
|
|
|
|
/* Type of variable */
|
|
# define TLS_T_OTHER 0
|
|
# define TLS_T_SRV 1
|
|
# define TLS_T_CLT 2
|
|
|
|
/*
|
|
** TLS_OK_F -- can var be an absolute filename?
|
|
**
|
|
** Parameters:
|
|
** var -- filename
|
|
** fn -- what is the filename used for?
|
|
** type -- type of variable
|
|
**
|
|
** Returns:
|
|
** ok?
|
|
*/
|
|
|
|
static bool
|
|
tls_ok_f(var, fn, type)
|
|
char *var;
|
|
char *fn;
|
|
int type;
|
|
{
|
|
/* must be absolute pathname */
|
|
if (var != NULL && *var == '/')
|
|
return true;
|
|
if (LogLevel > 12)
|
|
sm_syslog(LOG_WARNING, NOQID, "STARTTLS: %s%s missing",
|
|
type == TLS_T_SRV ? "Server" :
|
|
(type == TLS_T_CLT ? "Client" : ""), fn);
|
|
return false;
|
|
}
|
|
/*
|
|
** TLS_SAFE_F -- is a file safe to use?
|
|
**
|
|
** Parameters:
|
|
** var -- filename
|
|
** sff -- flags for safefile()
|
|
** srv -- server side?
|
|
**
|
|
** Returns:
|
|
** ok?
|
|
*/
|
|
|
|
static bool
|
|
tls_safe_f(var, sff, srv)
|
|
char *var;
|
|
long sff;
|
|
bool srv;
|
|
{
|
|
int ret;
|
|
|
|
if ((ret = safefile(var, RunAsUid, RunAsGid, RunAsUserName, sff,
|
|
S_IRUSR, NULL)) == 0)
|
|
return true;
|
|
if (LogLevel > 7)
|
|
sm_syslog(LOG_WARNING, NOQID, "STARTTLS=%s: file %s unsafe: %s",
|
|
srv ? "server" : "client", var, sm_errstring(ret));
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
** TLS_OK_F -- macro to simplify calls to tls_ok_f
|
|
**
|
|
** Parameters:
|
|
** var -- filename
|
|
** fn -- what is the filename used for?
|
|
** req -- is the file required?
|
|
** st -- status bit to set if ok
|
|
** type -- type of variable
|
|
**
|
|
** Side Effects:
|
|
** uses r, ok; may change ok and status.
|
|
**
|
|
*/
|
|
|
|
# define TLS_OK_F(var, fn, req, st, type) if (ok) \
|
|
{ \
|
|
r = tls_ok_f(var, fn, type); \
|
|
if (r) \
|
|
status |= st; \
|
|
else if (req) \
|
|
ok = false; \
|
|
}
|
|
|
|
/*
|
|
** TLS_UNR -- macro to return whether a file should be unreadable
|
|
**
|
|
** Parameters:
|
|
** bit -- flag to test
|
|
** req -- flags
|
|
**
|
|
** Returns:
|
|
** 0/SFF_NORFILES
|
|
*/
|
|
# define TLS_UNR(bit, req) (bitset(bit, req) ? SFF_NORFILES : 0)
|
|
# define TLS_OUNR(bit, req) (bitset(bit, req) ? SFF_NOWRFILES : 0)
|
|
# define TLS_KEYSFF(req) \
|
|
(bitnset(DBS_GROUPREADABLEKEYFILE, DontBlameSendmail) ? \
|
|
TLS_OUNR(TLS_I_KEY_OUNR, req) : \
|
|
TLS_UNR(TLS_I_KEY_UNR, req))
|
|
|
|
/*
|
|
** TLS_SAFE_F -- macro to simplify calls to tls_safe_f
|
|
**
|
|
** Parameters:
|
|
** var -- filename
|
|
** sff -- flags for safefile()
|
|
** req -- is the file required?
|
|
** ex -- does the file exist?
|
|
** st -- status bit to set if ok
|
|
** srv -- server side?
|
|
**
|
|
** Side Effects:
|
|
** uses r, ok, ex; may change ok and status.
|
|
**
|
|
*/
|
|
|
|
# define TLS_SAFE_F(var, sff, req, ex, st, srv) if (ex && ok) \
|
|
{ \
|
|
r = tls_safe_f(var, sff, srv); \
|
|
if (r) \
|
|
status |= st; \
|
|
else if (req) \
|
|
ok = false; \
|
|
}
|
|
|
|
# if _FFR_TLS_SE_OPTS
|
|
/*
|
|
** LOAD_CERTKEY -- load cert/key for TLS session
|
|
**
|
|
** Parameters:
|
|
** ssl -- TLS session context
|
|
** certfile -- filename of certificate
|
|
** keyfile -- filename of private key
|
|
**
|
|
** Returns:
|
|
** succeeded?
|
|
*/
|
|
|
|
bool
|
|
load_certkey(ssl, srv, certfile, keyfile)
|
|
SSL *ssl;
|
|
bool srv;
|
|
char *certfile;
|
|
char *keyfile;
|
|
{
|
|
bool ok;
|
|
int r;
|
|
long sff, status;
|
|
unsigned long req;
|
|
char *who;
|
|
|
|
ok = true;
|
|
who = srv ? "server" : "client";
|
|
status = TLS_S_NONE;
|
|
req = TLS_I_CERT_EX|TLS_I_KEY_EX;
|
|
TLS_OK_F(certfile, "CertFile", bitset(TLS_I_CERT_EX, req),
|
|
TLS_S_CERT_EX, srv ? TLS_T_SRV : TLS_T_CLT);
|
|
TLS_OK_F(keyfile, "KeyFile", bitset(TLS_I_KEY_EX, req),
|
|
TLS_S_KEY_EX, srv ? TLS_T_SRV : TLS_T_CLT);
|
|
|
|
/* certfile etc. must be "safe". */
|
|
sff = SFF_REGONLY | SFF_SAFEDIRPATH | SFF_NOWLINK
|
|
| SFF_NOGWFILES | SFF_NOWWFILES
|
|
| SFF_MUSTOWN | SFF_ROOTOK | SFF_OPENASROOT;
|
|
if (DontLockReadFiles)
|
|
sff |= SFF_NOLOCK;
|
|
|
|
TLS_SAFE_F(certfile, sff | TLS_UNR(TLS_I_CERT_UNR, req),
|
|
bitset(TLS_I_CERT_EX, req),
|
|
bitset(TLS_S_CERT_EX, status), TLS_S_CERT_OK, srv);
|
|
TLS_SAFE_F(keyfile, sff | TLS_KEYSFF(req),
|
|
bitset(TLS_I_KEY_EX, req),
|
|
bitset(TLS_S_KEY_EX, status), TLS_S_KEY_OK, srv);
|
|
|
|
# define SSL_use_cert(ssl, certfile) \
|
|
SSL_use_certificate_file(ssl, certfile, SSL_FILETYPE_PEM)
|
|
# define SSL_USE_CERT "SSL_use_certificate_file"
|
|
|
|
if (bitset(TLS_S_CERT_OK, status) &&
|
|
SSL_use_cert(ssl, certfile) <= 0)
|
|
{
|
|
if (LogLevel > 7)
|
|
{
|
|
sm_syslog(LOG_WARNING, NOQID,
|
|
"STARTTLS=%s, error: %s(%s) failed",
|
|
who, SSL_USE_CERT, certfile);
|
|
if (LogLevel > 9)
|
|
tlslogerr(LOG_WARNING, who);
|
|
}
|
|
if (bitset(TLS_I_USE_CERT, req))
|
|
return false;
|
|
}
|
|
if (bitset(TLS_S_KEY_OK, status) &&
|
|
SSL_use_PrivateKey_file(ssl, keyfile, SSL_FILETYPE_PEM) <= 0)
|
|
{
|
|
if (LogLevel > 7)
|
|
{
|
|
sm_syslog(LOG_WARNING, NOQID,
|
|
"STARTTLS=%s, error: SSL_use_PrivateKey_file(%s) failed",
|
|
who, keyfile);
|
|
if (LogLevel > 9)
|
|
tlslogerr(LOG_WARNING, who);
|
|
}
|
|
if (bitset(TLS_I_USE_KEY, req))
|
|
return false;
|
|
}
|
|
|
|
/* check the private key */
|
|
if (bitset(TLS_S_KEY_OK, status) &&
|
|
(r = SSL_check_private_key(ssl)) <= 0)
|
|
{
|
|
/* Private key does not match the certificate public key */
|
|
if (LogLevel > 5)
|
|
{
|
|
sm_syslog(LOG_WARNING, NOQID,
|
|
"STARTTLS=%s, error: SSL_check_private_key failed(%s): %d",
|
|
who, keyfile, r);
|
|
if (LogLevel > 9)
|
|
tlslogerr(LOG_WARNING, who);
|
|
}
|
|
if (bitset(TLS_I_USE_KEY, req))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
# endif /* _FFR_TLS_SE_OPTS */
|
|
|
|
/*
|
|
** INITTLS -- initialize TLS
|
|
**
|
|
** Parameters:
|
|
** ctx -- pointer to context
|
|
** req -- requirements for initialization (see sendmail.h)
|
|
** options -- options
|
|
** srv -- server side?
|
|
** certfile -- filename of certificate
|
|
** keyfile -- filename of private key
|
|
** cacertpath -- path to CAs
|
|
** cacertfile -- file with CA(s)
|
|
** dhparam -- parameters for DH
|
|
**
|
|
** Returns:
|
|
** succeeded?
|
|
*/
|
|
|
|
/*
|
|
** The session_id_context identifies the service that created a session.
|
|
** This information is used to distinguish between multiple TLS-based
|
|
** servers running on the same server. We use the name of the mail system.
|
|
** Note: the session cache is not persistent.
|
|
*/
|
|
|
|
static char server_session_id_context[] = "sendmail8";
|
|
|
|
/* 0.9.8a and b have a problem with SSL_OP_TLS_BLOCK_PADDING_BUG */
|
|
#if (OPENSSL_VERSION_NUMBER >= 0x0090800fL)
|
|
# define SM_SSL_OP_TLS_BLOCK_PADDING_BUG 1
|
|
#else
|
|
# define SM_SSL_OP_TLS_BLOCK_PADDING_BUG 0
|
|
#endif
|
|
|
|
bool
|
|
inittls(ctx, req, options, srv, certfile, keyfile, cacertpath, cacertfile, dhparam)
|
|
SSL_CTX **ctx;
|
|
unsigned long req;
|
|
unsigned long options;
|
|
bool srv;
|
|
char *certfile, *keyfile, *cacertpath, *cacertfile, *dhparam;
|
|
{
|
|
# if !NO_DH
|
|
static DH *dh = NULL;
|
|
# endif /* !NO_DH */
|
|
int r;
|
|
bool ok;
|
|
long sff, status;
|
|
char *who;
|
|
char *cf2, *kf2;
|
|
# if SM_CONF_SHM
|
|
extern int ShmId;
|
|
# endif /* SM_CONF_SHM */
|
|
# if OPENSSL_VERSION_NUMBER > 0x00907000L
|
|
BIO *crl_file;
|
|
X509_CRL *crl;
|
|
X509_STORE *store;
|
|
# endif /* OPENSSL_VERSION_NUMBER > 0x00907000L */
|
|
#if SM_SSL_OP_TLS_BLOCK_PADDING_BUG
|
|
long rt_version;
|
|
STACK_OF(SSL_COMP) *comp_methods;
|
|
#endif
|
|
|
|
status = TLS_S_NONE;
|
|
who = srv ? "server" : "client";
|
|
if (ctx == NULL)
|
|
{
|
|
syserr("STARTTLS=%s, inittls: ctx == NULL", who);
|
|
/* NOTREACHED */
|
|
SM_ASSERT(ctx != NULL);
|
|
}
|
|
|
|
/* already initialized? (we could re-init...) */
|
|
if (*ctx != NULL)
|
|
return true;
|
|
ok = true;
|
|
|
|
/*
|
|
** look for a second filename: it must be separated by a ','
|
|
** no blanks allowed (they won't be skipped).
|
|
** we change a global variable here! this change will be undone
|
|
** before return from the function but only if it returns true.
|
|
** this isn't a problem since in a failure case this function
|
|
** won't be called again with the same (overwritten) values.
|
|
** otherwise each return must be replaced with a goto endinittls.
|
|
*/
|
|
|
|
cf2 = NULL;
|
|
kf2 = NULL;
|
|
if (certfile != NULL && (cf2 = strchr(certfile, ',')) != NULL)
|
|
{
|
|
*cf2++ = '\0';
|
|
if (keyfile != NULL && (kf2 = strchr(keyfile, ',')) != NULL)
|
|
*kf2++ = '\0';
|
|
}
|
|
|
|
/*
|
|
** Check whether files/paths are defined
|
|
*/
|
|
|
|
TLS_OK_F(certfile, "CertFile", bitset(TLS_I_CERT_EX, req),
|
|
TLS_S_CERT_EX, srv ? TLS_T_SRV : TLS_T_CLT);
|
|
TLS_OK_F(keyfile, "KeyFile", bitset(TLS_I_KEY_EX, req),
|
|
TLS_S_KEY_EX, srv ? TLS_T_SRV : TLS_T_CLT);
|
|
TLS_OK_F(cacertpath, "CACertPath", bitset(TLS_I_CERTP_EX, req),
|
|
TLS_S_CERTP_EX, TLS_T_OTHER);
|
|
TLS_OK_F(cacertfile, "CACertFile", bitset(TLS_I_CERTF_EX, req),
|
|
TLS_S_CERTF_EX, TLS_T_OTHER);
|
|
|
|
# if OPENSSL_VERSION_NUMBER > 0x00907000L
|
|
TLS_OK_F(CRLFile, "CRLFile", bitset(TLS_I_CRLF_EX, req),
|
|
TLS_S_CRLF_EX, TLS_T_OTHER);
|
|
# endif /* OPENSSL_VERSION_NUMBER > 0x00907000L */
|
|
|
|
/*
|
|
** if the second file is specified it must exist
|
|
** XXX: it is possible here to define only one of those files
|
|
*/
|
|
|
|
if (cf2 != NULL)
|
|
{
|
|
TLS_OK_F(cf2, "CertFile", bitset(TLS_I_CERT_EX, req),
|
|
TLS_S_CERT2_EX, srv ? TLS_T_SRV : TLS_T_CLT);
|
|
}
|
|
if (kf2 != NULL)
|
|
{
|
|
TLS_OK_F(kf2, "KeyFile", bitset(TLS_I_KEY_EX, req),
|
|
TLS_S_KEY2_EX, srv ? TLS_T_SRV : TLS_T_CLT);
|
|
}
|
|
|
|
/*
|
|
** valid values for dhparam are (only the first char is checked)
|
|
** none no parameters: don't use DH
|
|
** i use precomputed 2048 bit parameters
|
|
** 512 use precomputed 512 bit parameters
|
|
** 1024 generate 1024 bit parameters
|
|
** 2048 generate 2048 bit parameters
|
|
** /file/name read parameters from /file/name
|
|
*/
|
|
|
|
#define SET_DH_DFL \
|
|
do { \
|
|
dhparam = "I"; \
|
|
req |= TLS_I_DHFIXED; \
|
|
} while (0)
|
|
|
|
if (bitset(TLS_I_TRY_DH, req))
|
|
{
|
|
if (dhparam != NULL)
|
|
{
|
|
char c = *dhparam;
|
|
|
|
if (c == '1')
|
|
req |= TLS_I_DH1024;
|
|
else if (c == 'I' || c == 'i')
|
|
req |= TLS_I_DHFIXED;
|
|
else if (c == '2')
|
|
req |= TLS_I_DH2048;
|
|
else if (c == '5')
|
|
req |= TLS_I_DH512;
|
|
else if (c == 'n' || c == 'N')
|
|
req &= ~TLS_I_TRY_DH;
|
|
else if (c != '/')
|
|
{
|
|
if (LogLevel > 12)
|
|
sm_syslog(LOG_WARNING, NOQID,
|
|
"STARTTLS=%s, error: illegal value '%s' for DHParameters",
|
|
who, dhparam);
|
|
dhparam = NULL;
|
|
}
|
|
}
|
|
if (dhparam == NULL)
|
|
SET_DH_DFL;
|
|
else if (*dhparam == '/')
|
|
{
|
|
TLS_OK_F(dhparam, "DHParameters",
|
|
bitset(TLS_I_DHPAR_EX, req),
|
|
TLS_S_DHPAR_EX, TLS_T_OTHER);
|
|
}
|
|
}
|
|
if (!ok)
|
|
return ok;
|
|
|
|
/* certfile etc. must be "safe". */
|
|
sff = SFF_REGONLY | SFF_SAFEDIRPATH | SFF_NOWLINK
|
|
| SFF_NOGWFILES | SFF_NOWWFILES
|
|
| SFF_MUSTOWN | SFF_ROOTOK | SFF_OPENASROOT;
|
|
if (DontLockReadFiles)
|
|
sff |= SFF_NOLOCK;
|
|
|
|
TLS_SAFE_F(certfile, sff | TLS_UNR(TLS_I_CERT_UNR, req),
|
|
bitset(TLS_I_CERT_EX, req),
|
|
bitset(TLS_S_CERT_EX, status), TLS_S_CERT_OK, srv);
|
|
TLS_SAFE_F(keyfile, sff | TLS_KEYSFF(req),
|
|
bitset(TLS_I_KEY_EX, req),
|
|
bitset(TLS_S_KEY_EX, status), TLS_S_KEY_OK, srv);
|
|
TLS_SAFE_F(cacertfile, sff | TLS_UNR(TLS_I_CERTF_UNR, req),
|
|
bitset(TLS_I_CERTF_EX, req),
|
|
bitset(TLS_S_CERTF_EX, status), TLS_S_CERTF_OK, srv);
|
|
if (dhparam != NULL && *dhparam == '/')
|
|
{
|
|
TLS_SAFE_F(dhparam, sff | TLS_UNR(TLS_I_DHPAR_UNR, req),
|
|
bitset(TLS_I_DHPAR_EX, req),
|
|
bitset(TLS_S_DHPAR_EX, status), TLS_S_DHPAR_OK, srv);
|
|
if (!bitset(TLS_S_DHPAR_OK, status))
|
|
SET_DH_DFL;
|
|
}
|
|
# if OPENSSL_VERSION_NUMBER > 0x00907000L
|
|
TLS_SAFE_F(CRLFile, sff | TLS_UNR(TLS_I_CRLF_UNR, req),
|
|
bitset(TLS_I_CRLF_EX, req),
|
|
bitset(TLS_S_CRLF_EX, status), TLS_S_CRLF_OK, srv);
|
|
# endif /* OPENSSL_VERSION_NUMBER > 0x00907000L */
|
|
if (!ok)
|
|
return ok;
|
|
if (cf2 != NULL)
|
|
{
|
|
TLS_SAFE_F(cf2, sff | TLS_UNR(TLS_I_CERT_UNR, req),
|
|
bitset(TLS_I_CERT_EX, req),
|
|
bitset(TLS_S_CERT2_EX, status), TLS_S_CERT2_OK, srv);
|
|
}
|
|
if (kf2 != NULL)
|
|
{
|
|
TLS_SAFE_F(kf2, sff | TLS_KEYSFF(req),
|
|
bitset(TLS_I_KEY_EX, req),
|
|
bitset(TLS_S_KEY2_EX, status), TLS_S_KEY2_OK, srv);
|
|
}
|
|
|
|
/* create a method and a new context */
|
|
if ((*ctx = SSL_CTX_new(srv ? SSLv23_server_method() :
|
|
SSLv23_client_method())) == NULL)
|
|
{
|
|
if (LogLevel > 7)
|
|
sm_syslog(LOG_WARNING, NOQID,
|
|
"STARTTLS=%s, error: SSL_CTX_new(SSLv23_%s_method()) failed",
|
|
who, who);
|
|
if (LogLevel > 9)
|
|
tlslogerr(LOG_WARNING, who);
|
|
return false;
|
|
}
|
|
|
|
# if OPENSSL_VERSION_NUMBER > 0x00907000L
|
|
if (CRLFile != NULL)
|
|
{
|
|
/* get a pointer to the current certificate validation store */
|
|
store = SSL_CTX_get_cert_store(*ctx); /* does not fail */
|
|
crl_file = BIO_new(BIO_s_file_internal());
|
|
if (crl_file != NULL)
|
|
{
|
|
if (BIO_read_filename(crl_file, CRLFile) >= 0)
|
|
{
|
|
crl = PEM_read_bio_X509_CRL(crl_file, NULL,
|
|
NULL, NULL);
|
|
BIO_free(crl_file);
|
|
X509_STORE_add_crl(store, crl);
|
|
X509_CRL_free(crl);
|
|
X509_STORE_set_flags(store,
|
|
X509_V_FLAG_CRL_CHECK|X509_V_FLAG_CRL_CHECK_ALL);
|
|
X509_STORE_set_verify_cb_func(store,
|
|
x509_verify_cb);
|
|
}
|
|
else
|
|
{
|
|
if (LogLevel > 9)
|
|
{
|
|
sm_syslog(LOG_WARNING, NOQID,
|
|
"STARTTLS=%s, error: PEM_read_bio_X509_CRL(%s)=failed",
|
|
who, CRLFile);
|
|
}
|
|
|
|
/* avoid memory leaks */
|
|
BIO_free(crl_file);
|
|
return false;
|
|
}
|
|
|
|
}
|
|
else if (LogLevel > 9)
|
|
sm_syslog(LOG_WARNING, NOQID,
|
|
"STARTTLS=%s, error: BIO_new=failed", who);
|
|
}
|
|
else
|
|
store = NULL;
|
|
# if _FFR_CRLPATH
|
|
if (CRLPath != NULL && store != NULL)
|
|
{
|
|
X509_LOOKUP *lookup;
|
|
|
|
lookup = X509_STORE_add_lookup(store, X509_LOOKUP_hash_dir());
|
|
if (lookup == NULL)
|
|
{
|
|
if (LogLevel > 9)
|
|
{
|
|
sm_syslog(LOG_WARNING, NOQID,
|
|
"STARTTLS=%s, error: X509_STORE_add_lookup(hash)=failed",
|
|
who, CRLFile);
|
|
}
|
|
return false;
|
|
}
|
|
X509_LOOKUP_add_dir(lookup, CRLPath, X509_FILETYPE_PEM);
|
|
X509_STORE_set_flags(store,
|
|
X509_V_FLAG_CRL_CHECK|X509_V_FLAG_CRL_CHECK_ALL);
|
|
}
|
|
# endif /* _FFR_CRLPATH */
|
|
# endif /* OPENSSL_VERSION_NUMBER > 0x00907000L */
|
|
|
|
# if TLS_NO_RSA
|
|
/* turn off backward compatibility, required for no-rsa */
|
|
SSL_CTX_set_options(*ctx, SSL_OP_NO_SSLv2);
|
|
# endif /* TLS_NO_RSA */
|
|
|
|
|
|
# if !TLS_NO_RSA
|
|
/*
|
|
** Create a temporary RSA key
|
|
** XXX Maybe we shouldn't create this always (even though it
|
|
** is only at startup).
|
|
** It is a time-consuming operation and it is not always necessary.
|
|
** maybe we should do it only on demand...
|
|
*/
|
|
|
|
if (bitset(TLS_I_RSA_TMP, req)
|
|
# if SM_CONF_SHM
|
|
&& ShmId != SM_SHM_NO_ID &&
|
|
(rsa_tmp = RSA_generate_key(RSA_KEYLENGTH, RSA_F4, NULL,
|
|
NULL)) == NULL
|
|
# else /* SM_CONF_SHM */
|
|
&& 0 /* no shared memory: no need to generate key now */
|
|
# endif /* SM_CONF_SHM */
|
|
)
|
|
{
|
|
if (LogLevel > 7)
|
|
{
|
|
sm_syslog(LOG_WARNING, NOQID,
|
|
"STARTTLS=%s, error: RSA_generate_key failed",
|
|
who);
|
|
if (LogLevel > 9)
|
|
tlslogerr(LOG_WARNING, who);
|
|
}
|
|
return false;
|
|
}
|
|
# endif /* !TLS_NO_RSA */
|
|
|
|
/*
|
|
** load private key
|
|
** XXX change this for DSA-only version
|
|
*/
|
|
|
|
if (bitset(TLS_S_KEY_OK, status) &&
|
|
SSL_CTX_use_PrivateKey_file(*ctx, keyfile,
|
|
SSL_FILETYPE_PEM) <= 0)
|
|
{
|
|
if (LogLevel > 7)
|
|
{
|
|
sm_syslog(LOG_WARNING, NOQID,
|
|
"STARTTLS=%s, error: SSL_CTX_use_PrivateKey_file(%s) failed",
|
|
who, keyfile);
|
|
if (LogLevel > 9)
|
|
tlslogerr(LOG_WARNING, who);
|
|
}
|
|
if (bitset(TLS_I_USE_KEY, req))
|
|
return false;
|
|
}
|
|
|
|
#if _FFR_TLS_USE_CERTIFICATE_CHAIN_FILE
|
|
# define SSL_CTX_use_cert(ssl_ctx, certfile) \
|
|
SSL_CTX_use_certificate_chain_file(ssl_ctx, certfile)
|
|
# define SSL_CTX_USE_CERT "SSL_CTX_use_certificate_chain_file"
|
|
#else
|
|
# define SSL_CTX_use_cert(ssl_ctx, certfile) \
|
|
SSL_CTX_use_certificate_file(ssl_ctx, certfile, SSL_FILETYPE_PEM)
|
|
# define SSL_CTX_USE_CERT "SSL_CTX_use_certificate_file"
|
|
#endif
|
|
|
|
/* get the certificate file */
|
|
if (bitset(TLS_S_CERT_OK, status) &&
|
|
SSL_CTX_use_cert(*ctx, certfile) <= 0)
|
|
{
|
|
if (LogLevel > 7)
|
|
{
|
|
sm_syslog(LOG_WARNING, NOQID,
|
|
"STARTTLS=%s, error: %s(%s) failed",
|
|
who, SSL_CTX_USE_CERT, certfile);
|
|
if (LogLevel > 9)
|
|
tlslogerr(LOG_WARNING, who);
|
|
}
|
|
if (bitset(TLS_I_USE_CERT, req))
|
|
return false;
|
|
}
|
|
|
|
/* check the private key */
|
|
if (bitset(TLS_S_KEY_OK, status) &&
|
|
(r = SSL_CTX_check_private_key(*ctx)) <= 0)
|
|
{
|
|
/* Private key does not match the certificate public key */
|
|
if (LogLevel > 5)
|
|
{
|
|
sm_syslog(LOG_WARNING, NOQID,
|
|
"STARTTLS=%s, error: SSL_CTX_check_private_key failed(%s): %d",
|
|
who, keyfile, r);
|
|
if (LogLevel > 9)
|
|
tlslogerr(LOG_WARNING, who);
|
|
}
|
|
if (bitset(TLS_I_USE_KEY, req))
|
|
return false;
|
|
}
|
|
|
|
/* XXX this code is pretty much duplicated from above! */
|
|
|
|
/* load private key */
|
|
if (bitset(TLS_S_KEY2_OK, status) &&
|
|
SSL_CTX_use_PrivateKey_file(*ctx, kf2, SSL_FILETYPE_PEM) <= 0)
|
|
{
|
|
if (LogLevel > 7)
|
|
{
|
|
sm_syslog(LOG_WARNING, NOQID,
|
|
"STARTTLS=%s, error: SSL_CTX_use_PrivateKey_file(%s) failed",
|
|
who, kf2);
|
|
if (LogLevel > 9)
|
|
tlslogerr(LOG_WARNING, who);
|
|
}
|
|
}
|
|
|
|
/* get the certificate file */
|
|
if (bitset(TLS_S_CERT2_OK, status) &&
|
|
SSL_CTX_use_cert(*ctx, cf2) <= 0)
|
|
{
|
|
if (LogLevel > 7)
|
|
{
|
|
sm_syslog(LOG_WARNING, NOQID,
|
|
"STARTTLS=%s, error: %s(%s) failed",
|
|
who, SSL_CTX_USE_CERT, cf2);
|
|
if (LogLevel > 9)
|
|
tlslogerr(LOG_WARNING, who);
|
|
}
|
|
}
|
|
|
|
/* also check the private key */
|
|
if (bitset(TLS_S_KEY2_OK, status) &&
|
|
(r = SSL_CTX_check_private_key(*ctx)) <= 0)
|
|
{
|
|
/* Private key does not match the certificate public key */
|
|
if (LogLevel > 5)
|
|
{
|
|
sm_syslog(LOG_WARNING, NOQID,
|
|
"STARTTLS=%s, error: SSL_CTX_check_private_key 2 failed: %d",
|
|
who, r);
|
|
if (LogLevel > 9)
|
|
tlslogerr(LOG_WARNING, who);
|
|
}
|
|
}
|
|
|
|
/* SSL_CTX_set_quiet_shutdown(*ctx, 1); violation of standard? */
|
|
|
|
#if SM_SSL_OP_TLS_BLOCK_PADDING_BUG
|
|
|
|
/*
|
|
** In OpenSSL 0.9.8[ab], enabling zlib compression breaks the
|
|
** padding bug work-around, leading to false positives and
|
|
** failed connections. We may not interoperate with systems
|
|
** with the bug, but this is better than breaking on all 0.9.8[ab]
|
|
** systems that have zlib support enabled.
|
|
** Note: this checks the runtime version of the library, not
|
|
** just the compile time version.
|
|
*/
|
|
|
|
rt_version = SSLeay();
|
|
if (rt_version >= 0x00908000L && rt_version <= 0x0090802fL)
|
|
{
|
|
comp_methods = SSL_COMP_get_compression_methods();
|
|
if (comp_methods != NULL && sk_SSL_COMP_num(comp_methods) > 0)
|
|
options &= ~SSL_OP_TLS_BLOCK_PADDING_BUG;
|
|
}
|
|
#endif
|
|
SSL_CTX_set_options(*ctx, (long) options);
|
|
|
|
# if !NO_DH
|
|
/* Diffie-Hellman initialization */
|
|
if (bitset(TLS_I_TRY_DH, req))
|
|
{
|
|
#if _FFR_TLS_EC
|
|
EC_KEY *ecdh;
|
|
#endif /* _FFR_TLS_EC */
|
|
|
|
if (tTd(96, 8))
|
|
sm_dprintf("inittls: req=%#lx, status=%#lx\n",
|
|
req, status);
|
|
if (bitset(TLS_S_DHPAR_OK, status))
|
|
{
|
|
BIO *bio;
|
|
|
|
if ((bio = BIO_new_file(dhparam, "r")) != NULL)
|
|
{
|
|
dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
|
|
BIO_free(bio);
|
|
if (dh == NULL && LogLevel > 7)
|
|
{
|
|
unsigned long err;
|
|
|
|
err = ERR_get_error();
|
|
sm_syslog(LOG_WARNING, NOQID,
|
|
"STARTTLS=%s, error: cannot read DH parameters(%s): %s",
|
|
who, dhparam,
|
|
ERR_error_string(err, NULL));
|
|
if (LogLevel > 9)
|
|
tlslogerr(LOG_WARNING, who);
|
|
SET_DH_DFL;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (LogLevel > 5)
|
|
{
|
|
sm_syslog(LOG_WARNING, NOQID,
|
|
"STARTTLS=%s, error: BIO_new_file(%s) failed",
|
|
who, dhparam);
|
|
if (LogLevel > 9)
|
|
tlslogerr(LOG_WARNING, who);
|
|
}
|
|
}
|
|
}
|
|
if (dh == NULL && bitset(TLS_I_DH1024|TLS_I_DH2048, req))
|
|
{
|
|
int bits;
|
|
DSA *dsa;
|
|
|
|
bits = bitset(TLS_I_DH2048, req) ? 2048 : 1024;
|
|
if (tTd(96, 2))
|
|
sm_dprintf("inittls: Generating %d bit DH parameters\n", bits);
|
|
|
|
/* this takes a while! */
|
|
dsa = DSA_generate_parameters(bits, NULL, 0, NULL,
|
|
NULL, 0, NULL);
|
|
dh = DSA_dup_DH(dsa);
|
|
DSA_free(dsa);
|
|
}
|
|
else if (dh == NULL && bitset(TLS_I_DHFIXED, req))
|
|
{
|
|
if (tTd(96, 2))
|
|
sm_dprintf("inittls: Using precomputed 2048 bit DH parameters\n");
|
|
dh = get_dh2048();
|
|
}
|
|
else if (dh == NULL && bitset(TLS_I_DH512, req))
|
|
{
|
|
if (tTd(96, 2))
|
|
sm_dprintf("inittls: Using precomputed 512 bit DH parameters\n");
|
|
dh = get_dh512();
|
|
}
|
|
|
|
if (dh == NULL)
|
|
{
|
|
if (LogLevel > 9)
|
|
{
|
|
unsigned long err;
|
|
|
|
err = ERR_get_error();
|
|
sm_syslog(LOG_WARNING, NOQID,
|
|
"STARTTLS=%s, error: cannot read or set DH parameters(%s): %s",
|
|
who, dhparam,
|
|
ERR_error_string(err, NULL));
|
|
}
|
|
if (bitset(TLS_I_REQ_DH, req))
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
/* important to avoid small subgroup attacks */
|
|
SSL_CTX_set_options(*ctx, SSL_OP_SINGLE_DH_USE);
|
|
|
|
SSL_CTX_set_tmp_dh(*ctx, dh);
|
|
if (LogLevel > 13)
|
|
sm_syslog(LOG_INFO, NOQID,
|
|
"STARTTLS=%s, Diffie-Hellman init, key=%d bit (%c)",
|
|
who, 8 * DH_size(dh), *dhparam);
|
|
DH_free(dh);
|
|
}
|
|
|
|
#if _FFR_TLS_EC
|
|
ecdh = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
|
|
if (ecdh != NULL)
|
|
{
|
|
SSL_CTX_set_options(*ctx, SSL_OP_SINGLE_ECDH_USE);
|
|
SSL_CTX_set_tmp_ecdh(*ctx, ecdh);
|
|
EC_KEY_free(ecdh);
|
|
}
|
|
#endif /* _FFR_TLS_EC */
|
|
|
|
}
|
|
# endif /* !NO_DH */
|
|
|
|
|
|
/* XXX do we need this cache here? */
|
|
if (bitset(TLS_I_CACHE, req))
|
|
{
|
|
SSL_CTX_sess_set_cache_size(*ctx, 1);
|
|
SSL_CTX_set_timeout(*ctx, 1);
|
|
SSL_CTX_set_session_id_context(*ctx,
|
|
(void *) &server_session_id_context,
|
|
sizeof(server_session_id_context));
|
|
(void) SSL_CTX_set_session_cache_mode(*ctx,
|
|
SSL_SESS_CACHE_SERVER);
|
|
}
|
|
else
|
|
{
|
|
(void) SSL_CTX_set_session_cache_mode(*ctx,
|
|
SSL_SESS_CACHE_OFF);
|
|
}
|
|
|
|
/* load certificate locations and default CA paths */
|
|
if (bitset(TLS_S_CERTP_EX, status) && bitset(TLS_S_CERTF_EX, status))
|
|
{
|
|
if ((r = SSL_CTX_load_verify_locations(*ctx, cacertfile,
|
|
cacertpath)) == 1)
|
|
{
|
|
# if !TLS_NO_RSA
|
|
if (bitset(TLS_I_RSA_TMP, req))
|
|
SSL_CTX_set_tmp_rsa_callback(*ctx, tmp_rsa_key);
|
|
# endif /* !TLS_NO_RSA */
|
|
|
|
/*
|
|
** We have to install our own verify callback:
|
|
** SSL_VERIFY_PEER requests a client cert but even
|
|
** though *FAIL_IF* isn't set, the connection
|
|
** will be aborted if the client presents a cert
|
|
** that is not "liked" (can't be verified?) by
|
|
** the TLS library :-(
|
|
*/
|
|
|
|
/*
|
|
** XXX currently we could call tls_set_verify()
|
|
** but we hope that that function will later on
|
|
** only set the mode per connection.
|
|
*/
|
|
SSL_CTX_set_verify(*ctx,
|
|
bitset(TLS_I_NO_VRFY, req) ? SSL_VERIFY_NONE
|
|
: SSL_VERIFY_PEER,
|
|
NULL);
|
|
|
|
/* install verify callback */
|
|
SSL_CTX_set_cert_verify_callback(*ctx, tls_verify_cb,
|
|
NULL);
|
|
SSL_CTX_set_client_CA_list(*ctx,
|
|
SSL_load_client_CA_file(cacertfile));
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
** can't load CA data; do we care?
|
|
** the data is necessary to authenticate the client,
|
|
** which in turn would be necessary
|
|
** if we want to allow relaying based on it.
|
|
*/
|
|
if (LogLevel > 5)
|
|
{
|
|
sm_syslog(LOG_WARNING, NOQID,
|
|
"STARTTLS=%s, error: load verify locs %s, %s failed: %d",
|
|
who, cacertpath, cacertfile, r);
|
|
if (LogLevel > 9)
|
|
tlslogerr(LOG_WARNING, who);
|
|
}
|
|
if (bitset(TLS_I_VRFY_LOC, req))
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/* XXX: make this dependent on an option? */
|
|
if (tTd(96, 9))
|
|
SSL_CTX_set_info_callback(*ctx, apps_ssl_info_cb);
|
|
|
|
/* install our own cipher list */
|
|
if (CipherList != NULL && *CipherList != '\0')
|
|
{
|
|
if (SSL_CTX_set_cipher_list(*ctx, CipherList) <= 0)
|
|
{
|
|
if (LogLevel > 7)
|
|
{
|
|
sm_syslog(LOG_WARNING, NOQID,
|
|
"STARTTLS=%s, error: SSL_CTX_set_cipher_list(%s) failed, list ignored",
|
|
who, CipherList);
|
|
|
|
if (LogLevel > 9)
|
|
tlslogerr(LOG_WARNING, who);
|
|
}
|
|
/* failure if setting to this list is required? */
|
|
}
|
|
}
|
|
|
|
if (LogLevel > 12)
|
|
sm_syslog(LOG_INFO, NOQID, "STARTTLS=%s, init=%d", who, ok);
|
|
|
|
# if 0
|
|
/*
|
|
** this label is required if we want to have a "clean" exit
|
|
** see the comments above at the initialization of cf2
|
|
*/
|
|
|
|
endinittls:
|
|
# endif /* 0 */
|
|
|
|
/* undo damage to global variables */
|
|
if (cf2 != NULL)
|
|
*--cf2 = ',';
|
|
if (kf2 != NULL)
|
|
*--kf2 = ',';
|
|
|
|
return ok;
|
|
}
|
|
|
|
/*
|
|
** CERT_FP -- get cert fingerprint
|
|
**
|
|
** Parameters:
|
|
** cert -- TLS cert
|
|
** mac -- macro storage
|
|
** macro -- where to store cert fp
|
|
**
|
|
** Returns:
|
|
** <=0: cert fp calculation failed
|
|
** >0: cert fp calculation ok
|
|
*/
|
|
|
|
static int
|
|
cert_fp(cert, evp_digest, mac, macro)
|
|
X509 *cert;
|
|
const EVP_MD *evp_digest;
|
|
MACROS_T *mac;
|
|
char *macro;
|
|
{
|
|
unsigned int n;
|
|
int r;
|
|
unsigned char md[EVP_MAX_MD_SIZE];
|
|
char md5h[EVP_MAX_MD_SIZE * 3];
|
|
static const char hexcodes[] = "0123456789ABCDEF";
|
|
|
|
n = 0;
|
|
if (X509_digest(cert, EVP_digest, md, &n) == 0 || n <= 0)
|
|
{
|
|
macdefine(mac, A_TEMP, macid(macro), "");
|
|
return 0;
|
|
}
|
|
|
|
SM_ASSERT((n * 3) + 2 < sizeof(md5h));
|
|
for (r = 0; r < (int) n; r++)
|
|
{
|
|
md5h[r * 3] = hexcodes[(md[r] & 0xf0) >> 4];
|
|
md5h[(r * 3) + 1] = hexcodes[(md[r] & 0x0f)];
|
|
md5h[(r * 3) + 2] = ':';
|
|
}
|
|
md5h[(n * 3) - 1] = '\0';
|
|
macdefine(mac, A_TEMP, macid(macro), md5h);
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
** TLS_GET_INFO -- get information about TLS connection
|
|
**
|
|
** Parameters:
|
|
** ssl -- TLS connection structure
|
|
** srv -- server or client
|
|
** host -- hostname of other side
|
|
** mac -- macro storage
|
|
** certreq -- did we ask for a cert?
|
|
**
|
|
** Returns:
|
|
** result of authentication.
|
|
**
|
|
** Side Effects:
|
|
** sets various TLS related macros.
|
|
*/
|
|
|
|
int
|
|
tls_get_info(ssl, srv, host, mac, certreq)
|
|
SSL *ssl;
|
|
bool srv;
|
|
char *host;
|
|
MACROS_T *mac;
|
|
bool certreq;
|
|
{
|
|
const SSL_CIPHER *c;
|
|
int b, r;
|
|
long verifyok;
|
|
char *s, *who;
|
|
char bitstr[16];
|
|
X509 *cert;
|
|
|
|
c = SSL_get_current_cipher(ssl);
|
|
|
|
/* cast is just workaround for compiler warning */
|
|
macdefine(mac, A_TEMP, macid("{cipher}"),
|
|
(char *) SSL_CIPHER_get_name(c));
|
|
b = SSL_CIPHER_get_bits(c, &r);
|
|
(void) sm_snprintf(bitstr, sizeof(bitstr), "%d", b);
|
|
macdefine(mac, A_TEMP, macid("{cipher_bits}"), bitstr);
|
|
(void) sm_snprintf(bitstr, sizeof(bitstr), "%d", r);
|
|
macdefine(mac, A_TEMP, macid("{alg_bits}"), bitstr);
|
|
s = (char *) SSL_get_version(ssl);
|
|
if (s == NULL)
|
|
s = "UNKNOWN";
|
|
macdefine(mac, A_TEMP, macid("{tls_version}"), s);
|
|
|
|
who = srv ? "server" : "client";
|
|
cert = SSL_get_peer_certificate(ssl);
|
|
verifyok = SSL_get_verify_result(ssl);
|
|
if (LogLevel > 14)
|
|
sm_syslog(LOG_INFO, NOQID,
|
|
"STARTTLS=%s, get_verify: %ld get_peer: 0x%lx",
|
|
who, verifyok, (unsigned long) cert);
|
|
if (cert != NULL)
|
|
{
|
|
X509_NAME *subj, *issuer;
|
|
char buf[MAXNAME];
|
|
|
|
subj = X509_get_subject_name(cert);
|
|
issuer = X509_get_issuer_name(cert);
|
|
X509_NAME_oneline(subj, buf, sizeof(buf));
|
|
macdefine(mac, A_TEMP, macid("{cert_subject}"),
|
|
xtextify(buf, "<>\")"));
|
|
X509_NAME_oneline(issuer, buf, sizeof(buf));
|
|
macdefine(mac, A_TEMP, macid("{cert_issuer}"),
|
|
xtextify(buf, "<>\")"));
|
|
|
|
# define LL_BADCERT 8
|
|
|
|
#define CERTFPMACRO (CertFingerprintAlgorithm != NULL ? "{cert_fp}" : "{cert_md5}")
|
|
|
|
#define CHECK_X509_NAME(which) \
|
|
do { \
|
|
if (r == -1) \
|
|
{ \
|
|
sm_strlcpy(buf, "BadCertificateUnknown", sizeof(buf)); \
|
|
if (LogLevel > LL_BADCERT) \
|
|
sm_syslog(LOG_INFO, NOQID, \
|
|
"STARTTLS=%s, relay=%.100s, field=%s, status=failed to extract CN", \
|
|
who, \
|
|
host == NULL ? "local" : host, \
|
|
which); \
|
|
} \
|
|
else if ((size_t)r >= sizeof(buf) - 1) \
|
|
{ \
|
|
sm_strlcpy(buf, "BadCertificateTooLong", sizeof(buf)); \
|
|
if (LogLevel > 7) \
|
|
sm_syslog(LOG_INFO, NOQID, \
|
|
"STARTTLS=%s, relay=%.100s, field=%s, status=CN too long", \
|
|
who, \
|
|
host == NULL ? "local" : host, \
|
|
which); \
|
|
} \
|
|
else if ((size_t)r > strlen(buf)) \
|
|
{ \
|
|
sm_strlcpy(buf, "BadCertificateContainsNUL", \
|
|
sizeof(buf)); \
|
|
if (LogLevel > 7) \
|
|
sm_syslog(LOG_INFO, NOQID, \
|
|
"STARTTLS=%s, relay=%.100s, field=%s, status=CN contains NUL", \
|
|
who, \
|
|
host == NULL ? "local" : host, \
|
|
which); \
|
|
} \
|
|
} while (0)
|
|
|
|
r = X509_NAME_get_text_by_NID(subj, NID_commonName, buf,
|
|
sizeof buf);
|
|
CHECK_X509_NAME("cn_subject");
|
|
macdefine(mac, A_TEMP, macid("{cn_subject}"),
|
|
xtextify(buf, "<>\")"));
|
|
r = X509_NAME_get_text_by_NID(issuer, NID_commonName, buf,
|
|
sizeof buf);
|
|
CHECK_X509_NAME("cn_issuer");
|
|
macdefine(mac, A_TEMP, macid("{cn_issuer}"),
|
|
xtextify(buf, "<>\")"));
|
|
(void) cert_fp(cert, EVP_digest, mac, CERTFPMACRO);
|
|
}
|
|
else
|
|
{
|
|
macdefine(mac, A_PERM, macid("{cert_subject}"), "");
|
|
macdefine(mac, A_PERM, macid("{cert_issuer}"), "");
|
|
macdefine(mac, A_PERM, macid("{cn_subject}"), "");
|
|
macdefine(mac, A_PERM, macid("{cn_issuer}"), "");
|
|
macdefine(mac, A_TEMP, macid(CERTFPMACRO), "");
|
|
}
|
|
switch (verifyok)
|
|
{
|
|
case X509_V_OK:
|
|
if (cert != NULL)
|
|
{
|
|
s = "OK";
|
|
r = TLS_AUTH_OK;
|
|
}
|
|
else
|
|
{
|
|
s = certreq ? "NO" : "NOT",
|
|
r = TLS_AUTH_NO;
|
|
}
|
|
break;
|
|
default:
|
|
s = "FAIL";
|
|
r = TLS_AUTH_FAIL;
|
|
break;
|
|
}
|
|
macdefine(mac, A_PERM, macid("{verify}"), s);
|
|
if (cert != NULL)
|
|
X509_free(cert);
|
|
|
|
/* do some logging */
|
|
if (LogLevel > 8)
|
|
{
|
|
char *vers, *s1, *s2, *cbits, *algbits;
|
|
|
|
vers = macget(mac, macid("{tls_version}"));
|
|
cbits = macget(mac, macid("{cipher_bits}"));
|
|
algbits = macget(mac, macid("{alg_bits}"));
|
|
s1 = macget(mac, macid("{verify}"));
|
|
s2 = macget(mac, macid("{cipher}"));
|
|
|
|
/* XXX: maybe cut off ident info? */
|
|
sm_syslog(LOG_INFO, NOQID,
|
|
"STARTTLS=%s, relay=%.100s, version=%.16s, verify=%.16s, cipher=%.64s, bits=%.6s/%.6s",
|
|
who,
|
|
host == NULL ? "local" : host,
|
|
vers, s1, s2, /* sm_snprintf() can deal with NULL */
|
|
algbits == NULL ? "0" : algbits,
|
|
cbits == NULL ? "0" : cbits);
|
|
if (LogLevel > 11)
|
|
{
|
|
/*
|
|
** Maybe run xuntextify on the strings?
|
|
** That is easier to read but makes it maybe a bit
|
|
** more complicated to figure out the right values
|
|
** for the access map...
|
|
*/
|
|
|
|
s1 = macget(mac, macid("{cert_subject}"));
|
|
s2 = macget(mac, macid("{cert_issuer}"));
|
|
sm_syslog(LOG_INFO, NOQID,
|
|
"STARTTLS=%s, cert-subject=%.256s, cert-issuer=%.256s, verifymsg=%s",
|
|
who, s1, s2,
|
|
X509_verify_cert_error_string(verifyok));
|
|
}
|
|
}
|
|
return r;
|
|
}
|
|
/*
|
|
** ENDTLS -- shutdown secure connection
|
|
**
|
|
** Parameters:
|
|
** ssl -- SSL connection information.
|
|
** side -- server/client (for logging).
|
|
**
|
|
** Returns:
|
|
** success? (EX_* code)
|
|
*/
|
|
|
|
int
|
|
endtls(ssl, side)
|
|
SSL *ssl;
|
|
char *side;
|
|
{
|
|
int ret = EX_OK;
|
|
|
|
if (ssl != NULL)
|
|
{
|
|
int r;
|
|
|
|
if ((r = SSL_shutdown(ssl)) < 0)
|
|
{
|
|
if (LogLevel > 11)
|
|
{
|
|
sm_syslog(LOG_WARNING, NOQID,
|
|
"STARTTLS=%s, SSL_shutdown failed: %d",
|
|
side, r);
|
|
tlslogerr(LOG_WARNING, side);
|
|
}
|
|
ret = EX_SOFTWARE;
|
|
}
|
|
# if !defined(OPENSSL_VERSION_NUMBER) || OPENSSL_VERSION_NUMBER > 0x0090602fL
|
|
|
|
/*
|
|
** Bug in OpenSSL (at least up to 0.9.6b):
|
|
** From: Lutz.Jaenicke@aet.TU-Cottbus.DE
|
|
** Message-ID: <20010723152244.A13122@serv01.aet.tu-cottbus.de>
|
|
** To: openssl-users@openssl.org
|
|
** Subject: Re: SSL_shutdown() woes (fwd)
|
|
**
|
|
** The side sending the shutdown alert first will
|
|
** not care about the answer of the peer but will
|
|
** immediately return with a return value of "0"
|
|
** (ssl/s3_lib.c:ssl3_shutdown()). SSL_get_error will evaluate
|
|
** the value of "0" and as the shutdown alert of the peer was
|
|
** not received (actually, the program did not even wait for
|
|
** the answer), an SSL_ERROR_SYSCALL is flagged, because this
|
|
** is the default rule in case everything else does not apply.
|
|
**
|
|
** For your server the problem is different, because it
|
|
** receives the shutdown first (setting SSL_RECEIVED_SHUTDOWN),
|
|
** then sends its response (SSL_SENT_SHUTDOWN), so for the
|
|
** server the shutdown was successfull.
|
|
**
|
|
** As is by know, you would have to call SSL_shutdown() once
|
|
** and ignore an SSL_ERROR_SYSCALL returned. Then call
|
|
** SSL_shutdown() again to actually get the server's response.
|
|
**
|
|
** In the last discussion, Bodo Moeller concluded that a
|
|
** rewrite of the shutdown code would be necessary, but
|
|
** probably with another API, as the change would not be
|
|
** compatible to the way it is now. Things do not become
|
|
** easier as other programs do not follow the shutdown
|
|
** guidelines anyway, so that a lot error conditions and
|
|
** compitibility issues would have to be caught.
|
|
**
|
|
** For now the recommondation is to ignore the error message.
|
|
*/
|
|
|
|
else if (r == 0)
|
|
{
|
|
if (LogLevel > 15)
|
|
{
|
|
sm_syslog(LOG_WARNING, NOQID,
|
|
"STARTTLS=%s, SSL_shutdown not done",
|
|
side);
|
|
tlslogerr(LOG_WARNING, side);
|
|
}
|
|
ret = EX_SOFTWARE;
|
|
}
|
|
# endif /* !defined(OPENSSL_VERSION_NUMBER) || OPENSSL_VERSION_NUMBER > 0x0090602fL */
|
|
SSL_free(ssl);
|
|
ssl = NULL;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
# if !TLS_NO_RSA
|
|
/*
|
|
** TMP_RSA_KEY -- return temporary RSA key
|
|
**
|
|
** Parameters:
|
|
** s -- TLS connection structure
|
|
** export --
|
|
** keylength --
|
|
**
|
|
** Returns:
|
|
** temporary RSA key.
|
|
*/
|
|
|
|
# ifndef MAX_RSA_TMP_CNT
|
|
# define MAX_RSA_TMP_CNT 1000 /* XXX better value? */
|
|
# endif /* ! MAX_RSA_TMP_CNT */
|
|
|
|
/* ARGUSED0 */
|
|
static RSA *
|
|
tmp_rsa_key(s, export, keylength)
|
|
SSL *s;
|
|
int export;
|
|
int keylength;
|
|
{
|
|
# if SM_CONF_SHM
|
|
extern int ShmId;
|
|
extern int *PRSATmpCnt;
|
|
|
|
if (ShmId != SM_SHM_NO_ID && rsa_tmp != NULL &&
|
|
++(*PRSATmpCnt) < MAX_RSA_TMP_CNT)
|
|
return rsa_tmp;
|
|
# endif /* SM_CONF_SHM */
|
|
|
|
if (rsa_tmp != NULL)
|
|
RSA_free(rsa_tmp);
|
|
rsa_tmp = RSA_generate_key(RSA_KEYLENGTH, RSA_F4, NULL, NULL);
|
|
if (rsa_tmp == NULL)
|
|
{
|
|
if (LogLevel > 0)
|
|
sm_syslog(LOG_ERR, NOQID,
|
|
"STARTTLS=server, tmp_rsa_key: RSA_generate_key failed!");
|
|
}
|
|
else
|
|
{
|
|
# if SM_CONF_SHM
|
|
# if 0
|
|
/*
|
|
** XXX we can't (yet) share the new key...
|
|
** The RSA structure contains pointers hence it can't be
|
|
** easily kept in shared memory. It must be transformed
|
|
** into a continous memory region first, then stored,
|
|
** and later read out again (each time re-transformed).
|
|
*/
|
|
|
|
if (ShmId != SM_SHM_NO_ID)
|
|
*PRSATmpCnt = 0;
|
|
# endif /* 0 */
|
|
# endif /* SM_CONF_SHM */
|
|
if (LogLevel > 9)
|
|
sm_syslog(LOG_ERR, NOQID,
|
|
"STARTTLS=server, tmp_rsa_key: new temp RSA key");
|
|
}
|
|
return rsa_tmp;
|
|
}
|
|
# endif /* !TLS_NO_RSA */
|
|
/*
|
|
** APPS_SSL_INFO_CB -- info callback for TLS connections
|
|
**
|
|
** Parameters:
|
|
** s -- TLS connection structure
|
|
** where -- state in handshake
|
|
** ret -- return code of last operation
|
|
**
|
|
** Returns:
|
|
** none.
|
|
*/
|
|
|
|
static void
|
|
apps_ssl_info_cb(s, where, ret)
|
|
CONST097 SSL *s;
|
|
int where;
|
|
int ret;
|
|
{
|
|
int w;
|
|
char *str;
|
|
BIO *bio_err = NULL;
|
|
|
|
if (LogLevel > 14)
|
|
sm_syslog(LOG_INFO, NOQID,
|
|
"STARTTLS: info_callback where=0x%x, ret=%d",
|
|
where, ret);
|
|
|
|
w = where & ~SSL_ST_MASK;
|
|
if (bio_err == NULL)
|
|
bio_err = BIO_new_fp(stderr, BIO_NOCLOSE);
|
|
|
|
if (bitset(SSL_ST_CONNECT, w))
|
|
str = "SSL_connect";
|
|
else if (bitset(SSL_ST_ACCEPT, w))
|
|
str = "SSL_accept";
|
|
else
|
|
str = "undefined";
|
|
|
|
if (bitset(SSL_CB_LOOP, where))
|
|
{
|
|
if (LogLevel > 12)
|
|
sm_syslog(LOG_NOTICE, NOQID,
|
|
"STARTTLS: %s:%s",
|
|
str, SSL_state_string_long(s));
|
|
}
|
|
else if (bitset(SSL_CB_ALERT, where))
|
|
{
|
|
str = bitset(SSL_CB_READ, where) ? "read" : "write";
|
|
if (LogLevel > 12)
|
|
sm_syslog(LOG_NOTICE, NOQID,
|
|
"STARTTLS: SSL3 alert %s:%s:%s",
|
|
str, SSL_alert_type_string_long(ret),
|
|
SSL_alert_desc_string_long(ret));
|
|
}
|
|
else if (bitset(SSL_CB_EXIT, where))
|
|
{
|
|
if (ret == 0)
|
|
{
|
|
if (LogLevel > 7)
|
|
sm_syslog(LOG_WARNING, NOQID,
|
|
"STARTTLS: %s:failed in %s",
|
|
str, SSL_state_string_long(s));
|
|
}
|
|
else if (ret < 0)
|
|
{
|
|
if (LogLevel > 7)
|
|
sm_syslog(LOG_WARNING, NOQID,
|
|
"STARTTLS: %s:error in %s",
|
|
str, SSL_state_string_long(s));
|
|
}
|
|
}
|
|
}
|
|
/*
|
|
** TLS_VERIFY_LOG -- log verify error for TLS certificates
|
|
**
|
|
** Parameters:
|
|
** ok -- verify ok?
|
|
** ctx -- x509 context
|
|
** name -- from where is this called?
|
|
**
|
|
** Returns:
|
|
** 1 -- ok
|
|
*/
|
|
|
|
static int
|
|
tls_verify_log(ok, ctx, name)
|
|
int ok;
|
|
X509_STORE_CTX *ctx;
|
|
const char *name;
|
|
{
|
|
X509 *cert;
|
|
int reason, depth;
|
|
char buf[512];
|
|
|
|
cert = X509_STORE_CTX_get_current_cert(ctx);
|
|
reason = X509_STORE_CTX_get_error(ctx);
|
|
depth = X509_STORE_CTX_get_error_depth(ctx);
|
|
X509_NAME_oneline(X509_get_subject_name(cert), buf, sizeof(buf));
|
|
sm_syslog(LOG_INFO, NOQID,
|
|
"STARTTLS: %s cert verify: depth=%d %s, state=%d, reason=%s",
|
|
name, depth, buf, ok, X509_verify_cert_error_string(reason));
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
** TLS_VERIFY_CB -- verify callback for TLS certificates
|
|
**
|
|
** Parameters:
|
|
** ctx -- x509 context
|
|
**
|
|
** Returns:
|
|
** accept connection?
|
|
** currently: always yes.
|
|
*/
|
|
|
|
static int
|
|
# if !defined(OPENSSL_VERSION_NUMBER) || OPENSSL_VERSION_NUMBER < 0x00907000L
|
|
tls_verify_cb(ctx)
|
|
X509_STORE_CTX *ctx;
|
|
# else /* !defined() || OPENSSL_VERSION_NUMBER < 0x00907000L */
|
|
tls_verify_cb(ctx, unused)
|
|
X509_STORE_CTX *ctx;
|
|
void *unused;
|
|
# endif /* !defined() || OPENSSL_VERSION_NUMBER < 0x00907000L */
|
|
{
|
|
int ok;
|
|
|
|
/*
|
|
** man SSL_CTX_set_cert_verify_callback():
|
|
** callback should return 1 to indicate verification success
|
|
** and 0 to indicate verification failure.
|
|
*/
|
|
|
|
ok = X509_verify_cert(ctx);
|
|
if (ok <= 0)
|
|
{
|
|
if (LogLevel > 13)
|
|
return tls_verify_log(ok, ctx, "TLS");
|
|
}
|
|
return 1;
|
|
}
|
|
/*
|
|
** TLSLOGERR -- log the errors from the TLS error stack
|
|
**
|
|
** Parameters:
|
|
** level -- syslog level
|
|
** who -- server/client (for logging).
|
|
**
|
|
** Returns:
|
|
** none.
|
|
*/
|
|
|
|
void
|
|
tlslogerr(level, who)
|
|
int level;
|
|
const char *who;
|
|
{
|
|
unsigned long l;
|
|
int line, flags;
|
|
unsigned long es;
|
|
char *file, *data;
|
|
char buf[256];
|
|
|
|
es = CRYPTO_thread_id();
|
|
while ((l = ERR_get_error_line_data((const char **) &file, &line,
|
|
(const char **) &data, &flags))
|
|
!= 0)
|
|
{
|
|
sm_syslog(level, NOQID,
|
|
"STARTTLS=%s: %lu:%s:%s:%d:%s", who, es,
|
|
ERR_error_string(l, buf),
|
|
file, line,
|
|
bitset(ERR_TXT_STRING, flags) ? data : "");
|
|
}
|
|
}
|
|
|
|
# if OPENSSL_VERSION_NUMBER > 0x00907000L
|
|
/*
|
|
** X509_VERIFY_CB -- verify callback
|
|
**
|
|
** Parameters:
|
|
** ctx -- x509 context
|
|
**
|
|
** Returns:
|
|
** accept connection?
|
|
** currently: always yes.
|
|
*/
|
|
|
|
static int
|
|
x509_verify_cb(ok, ctx)
|
|
int ok;
|
|
X509_STORE_CTX *ctx;
|
|
{
|
|
if (ok == 0)
|
|
{
|
|
if (LogLevel > 13)
|
|
tls_verify_log(ok, ctx, "x509");
|
|
if (ctx->error == X509_V_ERR_UNABLE_TO_GET_CRL)
|
|
{
|
|
ctx->error = 0;
|
|
return 1; /* override it */
|
|
}
|
|
}
|
|
return ok;
|
|
}
|
|
# endif /* OPENSSL_VERSION_NUMBER > 0x00907000L */
|
|
#endif /* STARTTLS */
|