786 lines
25 KiB
C
786 lines
25 KiB
C
/*
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* Copyright 2015-2019 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#if defined(_WIN32)
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# include <windows.h>
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#endif
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#include <stdio.h>
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#include <string.h>
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#include <openssl/engine.h>
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#include <openssl/sha.h>
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#include <openssl/aes.h>
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#include <openssl/rsa.h>
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#include <openssl/evp.h>
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#include <openssl/async.h>
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#include <openssl/bn.h>
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#include <openssl/crypto.h>
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#include <openssl/ssl.h>
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#include <openssl/modes.h>
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#if defined(OPENSSL_SYS_UNIX) && defined(OPENSSL_THREADS)
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# undef ASYNC_POSIX
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# define ASYNC_POSIX
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# include <unistd.h>
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#elif defined(_WIN32)
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# undef ASYNC_WIN
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# define ASYNC_WIN
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#endif
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#include "e_dasync_err.c"
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/* Engine Id and Name */
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static const char *engine_dasync_id = "dasync";
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static const char *engine_dasync_name = "Dummy Async engine support";
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/* Engine Lifetime functions */
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static int dasync_destroy(ENGINE *e);
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static int dasync_init(ENGINE *e);
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static int dasync_finish(ENGINE *e);
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void engine_load_dasync_int(void);
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/* Set up digests. Just SHA1 for now */
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static int dasync_digests(ENGINE *e, const EVP_MD **digest,
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const int **nids, int nid);
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static void dummy_pause_job(void);
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/* SHA1 */
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static int dasync_sha1_init(EVP_MD_CTX *ctx);
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static int dasync_sha1_update(EVP_MD_CTX *ctx, const void *data,
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size_t count);
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static int dasync_sha1_final(EVP_MD_CTX *ctx, unsigned char *md);
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/*
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* Holds the EVP_MD object for sha1 in this engine. Set up once only during
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* engine bind and can then be reused many times.
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*/
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static EVP_MD *_hidden_sha1_md = NULL;
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static const EVP_MD *dasync_sha1(void)
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{
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return _hidden_sha1_md;
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}
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static void destroy_digests(void)
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{
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EVP_MD_meth_free(_hidden_sha1_md);
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_hidden_sha1_md = NULL;
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}
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static int dasync_digest_nids(const int **nids)
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{
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static int digest_nids[2] = { 0, 0 };
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static int pos = 0;
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static int init = 0;
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if (!init) {
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const EVP_MD *md;
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if ((md = dasync_sha1()) != NULL)
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digest_nids[pos++] = EVP_MD_type(md);
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digest_nids[pos] = 0;
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init = 1;
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}
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*nids = digest_nids;
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return pos;
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}
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/* RSA */
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static int dasync_pub_enc(int flen, const unsigned char *from,
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unsigned char *to, RSA *rsa, int padding);
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static int dasync_pub_dec(int flen, const unsigned char *from,
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unsigned char *to, RSA *rsa, int padding);
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static int dasync_rsa_priv_enc(int flen, const unsigned char *from,
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unsigned char *to, RSA *rsa, int padding);
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static int dasync_rsa_priv_dec(int flen, const unsigned char *from,
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unsigned char *to, RSA *rsa, int padding);
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static int dasync_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa,
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BN_CTX *ctx);
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static int dasync_rsa_init(RSA *rsa);
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static int dasync_rsa_finish(RSA *rsa);
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static RSA_METHOD *dasync_rsa_method = NULL;
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/* AES */
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static int dasync_aes128_cbc_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg,
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void *ptr);
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static int dasync_aes128_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
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const unsigned char *iv, int enc);
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static int dasync_aes128_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
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const unsigned char *in, size_t inl);
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static int dasync_aes128_cbc_cleanup(EVP_CIPHER_CTX *ctx);
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static int dasync_aes128_cbc_hmac_sha1_ctrl(EVP_CIPHER_CTX *ctx, int type,
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int arg, void *ptr);
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static int dasync_aes128_cbc_hmac_sha1_init_key(EVP_CIPHER_CTX *ctx,
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const unsigned char *key,
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const unsigned char *iv,
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int enc);
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static int dasync_aes128_cbc_hmac_sha1_cipher(EVP_CIPHER_CTX *ctx,
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unsigned char *out,
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const unsigned char *in,
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size_t inl);
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static int dasync_aes128_cbc_hmac_sha1_cleanup(EVP_CIPHER_CTX *ctx);
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struct dasync_pipeline_ctx {
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void *inner_cipher_data;
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unsigned int numpipes;
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unsigned char **inbufs;
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unsigned char **outbufs;
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size_t *lens;
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unsigned char tlsaad[SSL_MAX_PIPELINES][EVP_AEAD_TLS1_AAD_LEN];
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unsigned int aadctr;
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};
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/*
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* Holds the EVP_CIPHER object for aes_128_cbc in this engine. Set up once only
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* during engine bind and can then be reused many times.
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*/
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static EVP_CIPHER *_hidden_aes_128_cbc = NULL;
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static const EVP_CIPHER *dasync_aes_128_cbc(void)
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{
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return _hidden_aes_128_cbc;
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}
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/*
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* Holds the EVP_CIPHER object for aes_128_cbc_hmac_sha1 in this engine. Set up
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* once only during engine bind and can then be reused many times.
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*
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* This 'stitched' cipher depends on the EVP_aes_128_cbc_hmac_sha1() cipher,
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* which is implemented only if the AES-NI instruction set extension is available
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* (see OPENSSL_IA32CAP(3)). If that's not the case, then this cipher will not
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* be available either.
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*
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* Note: Since it is a legacy mac-then-encrypt cipher, modern TLS peers (which
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* negotiate the encrypt-then-mac extension) won't negotiate it anyway.
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*/
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static EVP_CIPHER *_hidden_aes_128_cbc_hmac_sha1 = NULL;
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static const EVP_CIPHER *dasync_aes_128_cbc_hmac_sha1(void)
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{
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return _hidden_aes_128_cbc_hmac_sha1;
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}
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static void destroy_ciphers(void)
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{
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EVP_CIPHER_meth_free(_hidden_aes_128_cbc);
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EVP_CIPHER_meth_free(_hidden_aes_128_cbc_hmac_sha1);
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_hidden_aes_128_cbc = NULL;
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_hidden_aes_128_cbc_hmac_sha1 = NULL;
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}
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static int dasync_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
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const int **nids, int nid);
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static int dasync_cipher_nids[] = {
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NID_aes_128_cbc,
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NID_aes_128_cbc_hmac_sha1,
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0
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};
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static int bind_dasync(ENGINE *e)
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{
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/* Setup RSA_METHOD */
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if ((dasync_rsa_method = RSA_meth_new("Dummy Async RSA method", 0)) == NULL
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|| RSA_meth_set_pub_enc(dasync_rsa_method, dasync_pub_enc) == 0
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|| RSA_meth_set_pub_dec(dasync_rsa_method, dasync_pub_dec) == 0
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|| RSA_meth_set_priv_enc(dasync_rsa_method, dasync_rsa_priv_enc) == 0
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|| RSA_meth_set_priv_dec(dasync_rsa_method, dasync_rsa_priv_dec) == 0
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|| RSA_meth_set_mod_exp(dasync_rsa_method, dasync_rsa_mod_exp) == 0
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|| RSA_meth_set_bn_mod_exp(dasync_rsa_method, BN_mod_exp_mont) == 0
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|| RSA_meth_set_init(dasync_rsa_method, dasync_rsa_init) == 0
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|| RSA_meth_set_finish(dasync_rsa_method, dasync_rsa_finish) == 0) {
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DASYNCerr(DASYNC_F_BIND_DASYNC, DASYNC_R_INIT_FAILED);
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return 0;
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}
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/* Ensure the dasync error handling is set up */
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ERR_load_DASYNC_strings();
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if (!ENGINE_set_id(e, engine_dasync_id)
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|| !ENGINE_set_name(e, engine_dasync_name)
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|| !ENGINE_set_RSA(e, dasync_rsa_method)
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|| !ENGINE_set_digests(e, dasync_digests)
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|| !ENGINE_set_ciphers(e, dasync_ciphers)
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|| !ENGINE_set_destroy_function(e, dasync_destroy)
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|| !ENGINE_set_init_function(e, dasync_init)
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|| !ENGINE_set_finish_function(e, dasync_finish)) {
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DASYNCerr(DASYNC_F_BIND_DASYNC, DASYNC_R_INIT_FAILED);
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return 0;
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}
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/*
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* Set up the EVP_CIPHER and EVP_MD objects for the ciphers/digests
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* supplied by this engine
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*/
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_hidden_sha1_md = EVP_MD_meth_new(NID_sha1, NID_sha1WithRSAEncryption);
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if (_hidden_sha1_md == NULL
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|| !EVP_MD_meth_set_result_size(_hidden_sha1_md, SHA_DIGEST_LENGTH)
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|| !EVP_MD_meth_set_input_blocksize(_hidden_sha1_md, SHA_CBLOCK)
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|| !EVP_MD_meth_set_app_datasize(_hidden_sha1_md,
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sizeof(EVP_MD *) + sizeof(SHA_CTX))
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|| !EVP_MD_meth_set_flags(_hidden_sha1_md, EVP_MD_FLAG_DIGALGID_ABSENT)
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|| !EVP_MD_meth_set_init(_hidden_sha1_md, dasync_sha1_init)
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|| !EVP_MD_meth_set_update(_hidden_sha1_md, dasync_sha1_update)
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|| !EVP_MD_meth_set_final(_hidden_sha1_md, dasync_sha1_final)) {
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EVP_MD_meth_free(_hidden_sha1_md);
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_hidden_sha1_md = NULL;
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}
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_hidden_aes_128_cbc = EVP_CIPHER_meth_new(NID_aes_128_cbc,
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16 /* block size */,
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16 /* key len */);
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if (_hidden_aes_128_cbc == NULL
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|| !EVP_CIPHER_meth_set_iv_length(_hidden_aes_128_cbc,16)
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|| !EVP_CIPHER_meth_set_flags(_hidden_aes_128_cbc,
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EVP_CIPH_FLAG_DEFAULT_ASN1
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| EVP_CIPH_CBC_MODE
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| EVP_CIPH_FLAG_PIPELINE)
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|| !EVP_CIPHER_meth_set_init(_hidden_aes_128_cbc,
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dasync_aes128_init_key)
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|| !EVP_CIPHER_meth_set_do_cipher(_hidden_aes_128_cbc,
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dasync_aes128_cbc_cipher)
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|| !EVP_CIPHER_meth_set_cleanup(_hidden_aes_128_cbc,
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dasync_aes128_cbc_cleanup)
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|| !EVP_CIPHER_meth_set_ctrl(_hidden_aes_128_cbc,
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dasync_aes128_cbc_ctrl)
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|| !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_aes_128_cbc,
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sizeof(struct dasync_pipeline_ctx))) {
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EVP_CIPHER_meth_free(_hidden_aes_128_cbc);
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_hidden_aes_128_cbc = NULL;
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}
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_hidden_aes_128_cbc_hmac_sha1 = EVP_CIPHER_meth_new(
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NID_aes_128_cbc_hmac_sha1,
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16 /* block size */,
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16 /* key len */);
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if (_hidden_aes_128_cbc_hmac_sha1 == NULL
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|| !EVP_CIPHER_meth_set_iv_length(_hidden_aes_128_cbc_hmac_sha1,16)
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|| !EVP_CIPHER_meth_set_flags(_hidden_aes_128_cbc_hmac_sha1,
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EVP_CIPH_CBC_MODE
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| EVP_CIPH_FLAG_DEFAULT_ASN1
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| EVP_CIPH_FLAG_AEAD_CIPHER
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| EVP_CIPH_FLAG_PIPELINE)
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|| !EVP_CIPHER_meth_set_init(_hidden_aes_128_cbc_hmac_sha1,
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dasync_aes128_cbc_hmac_sha1_init_key)
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|| !EVP_CIPHER_meth_set_do_cipher(_hidden_aes_128_cbc_hmac_sha1,
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dasync_aes128_cbc_hmac_sha1_cipher)
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|| !EVP_CIPHER_meth_set_cleanup(_hidden_aes_128_cbc_hmac_sha1,
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dasync_aes128_cbc_hmac_sha1_cleanup)
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|| !EVP_CIPHER_meth_set_ctrl(_hidden_aes_128_cbc_hmac_sha1,
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dasync_aes128_cbc_hmac_sha1_ctrl)
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|| !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_aes_128_cbc_hmac_sha1,
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sizeof(struct dasync_pipeline_ctx))) {
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EVP_CIPHER_meth_free(_hidden_aes_128_cbc_hmac_sha1);
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_hidden_aes_128_cbc_hmac_sha1 = NULL;
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}
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return 1;
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}
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# ifndef OPENSSL_NO_DYNAMIC_ENGINE
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static int bind_helper(ENGINE *e, const char *id)
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{
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if (id && (strcmp(id, engine_dasync_id) != 0))
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return 0;
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if (!bind_dasync(e))
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return 0;
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return 1;
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}
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IMPLEMENT_DYNAMIC_CHECK_FN()
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IMPLEMENT_DYNAMIC_BIND_FN(bind_helper)
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# endif
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static ENGINE *engine_dasync(void)
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{
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ENGINE *ret = ENGINE_new();
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if (!ret)
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return NULL;
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if (!bind_dasync(ret)) {
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ENGINE_free(ret);
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return NULL;
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}
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return ret;
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}
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void engine_load_dasync_int(void)
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{
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ENGINE *toadd = engine_dasync();
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if (!toadd)
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return;
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ENGINE_add(toadd);
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ENGINE_free(toadd);
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ERR_clear_error();
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}
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static int dasync_init(ENGINE *e)
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{
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return 1;
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}
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static int dasync_finish(ENGINE *e)
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{
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return 1;
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}
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static int dasync_destroy(ENGINE *e)
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{
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destroy_digests();
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destroy_ciphers();
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RSA_meth_free(dasync_rsa_method);
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ERR_unload_DASYNC_strings();
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return 1;
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}
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static int dasync_digests(ENGINE *e, const EVP_MD **digest,
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const int **nids, int nid)
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{
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int ok = 1;
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if (!digest) {
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/* We are returning a list of supported nids */
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return dasync_digest_nids(nids);
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}
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/* We are being asked for a specific digest */
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switch (nid) {
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case NID_sha1:
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*digest = dasync_sha1();
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break;
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default:
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ok = 0;
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*digest = NULL;
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break;
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}
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return ok;
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}
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static int dasync_ciphers(ENGINE *e, const EVP_CIPHER **cipher,
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const int **nids, int nid)
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{
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int ok = 1;
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if (cipher == NULL) {
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/* We are returning a list of supported nids */
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*nids = dasync_cipher_nids;
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return (sizeof(dasync_cipher_nids) -
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1) / sizeof(dasync_cipher_nids[0]);
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}
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/* We are being asked for a specific cipher */
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switch (nid) {
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case NID_aes_128_cbc:
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*cipher = dasync_aes_128_cbc();
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break;
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case NID_aes_128_cbc_hmac_sha1:
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*cipher = dasync_aes_128_cbc_hmac_sha1();
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break;
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default:
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ok = 0;
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*cipher = NULL;
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break;
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}
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return ok;
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}
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static void wait_cleanup(ASYNC_WAIT_CTX *ctx, const void *key,
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OSSL_ASYNC_FD readfd, void *pvwritefd)
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{
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OSSL_ASYNC_FD *pwritefd = (OSSL_ASYNC_FD *)pvwritefd;
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#if defined(ASYNC_WIN)
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CloseHandle(readfd);
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CloseHandle(*pwritefd);
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#elif defined(ASYNC_POSIX)
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close(readfd);
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close(*pwritefd);
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#endif
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OPENSSL_free(pwritefd);
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}
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#define DUMMY_CHAR 'X'
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static void dummy_pause_job(void) {
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ASYNC_JOB *job;
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ASYNC_WAIT_CTX *waitctx;
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OSSL_ASYNC_FD pipefds[2] = {0, 0};
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OSSL_ASYNC_FD *writefd;
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#if defined(ASYNC_WIN)
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DWORD numwritten, numread;
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char buf = DUMMY_CHAR;
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#elif defined(ASYNC_POSIX)
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char buf = DUMMY_CHAR;
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#endif
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if ((job = ASYNC_get_current_job()) == NULL)
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return;
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waitctx = ASYNC_get_wait_ctx(job);
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if (ASYNC_WAIT_CTX_get_fd(waitctx, engine_dasync_id, &pipefds[0],
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(void **)&writefd)) {
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pipefds[1] = *writefd;
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} else {
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writefd = OPENSSL_malloc(sizeof(*writefd));
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if (writefd == NULL)
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return;
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#if defined(ASYNC_WIN)
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if (CreatePipe(&pipefds[0], &pipefds[1], NULL, 256) == 0) {
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OPENSSL_free(writefd);
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return;
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}
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#elif defined(ASYNC_POSIX)
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if (pipe(pipefds) != 0) {
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OPENSSL_free(writefd);
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return;
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}
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#endif
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*writefd = pipefds[1];
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if (!ASYNC_WAIT_CTX_set_wait_fd(waitctx, engine_dasync_id, pipefds[0],
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writefd, wait_cleanup)) {
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wait_cleanup(waitctx, engine_dasync_id, pipefds[0], writefd);
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return;
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}
|
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}
|
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/*
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* In the Dummy async engine we are cheating. We signal that the job
|
|
* is complete by waking it before the call to ASYNC_pause_job(). A real
|
|
* async engine would only wake when the job was actually complete
|
|
*/
|
|
#if defined(ASYNC_WIN)
|
|
WriteFile(pipefds[1], &buf, 1, &numwritten, NULL);
|
|
#elif defined(ASYNC_POSIX)
|
|
if (write(pipefds[1], &buf, 1) < 0)
|
|
return;
|
|
#endif
|
|
|
|
/* Ignore errors - we carry on anyway */
|
|
ASYNC_pause_job();
|
|
|
|
/* Clear the wake signal */
|
|
#if defined(ASYNC_WIN)
|
|
ReadFile(pipefds[0], &buf, 1, &numread, NULL);
|
|
#elif defined(ASYNC_POSIX)
|
|
if (read(pipefds[0], &buf, 1) < 0)
|
|
return;
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* SHA1 implementation. At the moment we just defer to the standard
|
|
* implementation
|
|
*/
|
|
#undef data
|
|
#define data(ctx) ((SHA_CTX *)EVP_MD_CTX_md_data(ctx))
|
|
static int dasync_sha1_init(EVP_MD_CTX *ctx)
|
|
{
|
|
dummy_pause_job();
|
|
|
|
return SHA1_Init(data(ctx));
|
|
}
|
|
|
|
static int dasync_sha1_update(EVP_MD_CTX *ctx, const void *data,
|
|
size_t count)
|
|
{
|
|
dummy_pause_job();
|
|
|
|
return SHA1_Update(data(ctx), data, (size_t)count);
|
|
}
|
|
|
|
static int dasync_sha1_final(EVP_MD_CTX *ctx, unsigned char *md)
|
|
{
|
|
dummy_pause_job();
|
|
|
|
return SHA1_Final(md, data(ctx));
|
|
}
|
|
|
|
/*
|
|
* RSA implementation
|
|
*/
|
|
|
|
static int dasync_pub_enc(int flen, const unsigned char *from,
|
|
unsigned char *to, RSA *rsa, int padding) {
|
|
/* Ignore errors - we carry on anyway */
|
|
dummy_pause_job();
|
|
return RSA_meth_get_pub_enc(RSA_PKCS1_OpenSSL())
|
|
(flen, from, to, rsa, padding);
|
|
}
|
|
|
|
static int dasync_pub_dec(int flen, const unsigned char *from,
|
|
unsigned char *to, RSA *rsa, int padding) {
|
|
/* Ignore errors - we carry on anyway */
|
|
dummy_pause_job();
|
|
return RSA_meth_get_pub_dec(RSA_PKCS1_OpenSSL())
|
|
(flen, from, to, rsa, padding);
|
|
}
|
|
|
|
static int dasync_rsa_priv_enc(int flen, const unsigned char *from,
|
|
unsigned char *to, RSA *rsa, int padding)
|
|
{
|
|
/* Ignore errors - we carry on anyway */
|
|
dummy_pause_job();
|
|
return RSA_meth_get_priv_enc(RSA_PKCS1_OpenSSL())
|
|
(flen, from, to, rsa, padding);
|
|
}
|
|
|
|
static int dasync_rsa_priv_dec(int flen, const unsigned char *from,
|
|
unsigned char *to, RSA *rsa, int padding)
|
|
{
|
|
/* Ignore errors - we carry on anyway */
|
|
dummy_pause_job();
|
|
return RSA_meth_get_priv_dec(RSA_PKCS1_OpenSSL())
|
|
(flen, from, to, rsa, padding);
|
|
}
|
|
|
|
static int dasync_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx)
|
|
{
|
|
/* Ignore errors - we carry on anyway */
|
|
dummy_pause_job();
|
|
return RSA_meth_get_mod_exp(RSA_PKCS1_OpenSSL())(r0, I, rsa, ctx);
|
|
}
|
|
|
|
static int dasync_rsa_init(RSA *rsa)
|
|
{
|
|
return RSA_meth_get_init(RSA_PKCS1_OpenSSL())(rsa);
|
|
}
|
|
static int dasync_rsa_finish(RSA *rsa)
|
|
{
|
|
return RSA_meth_get_finish(RSA_PKCS1_OpenSSL())(rsa);
|
|
}
|
|
|
|
/* Cipher helper functions */
|
|
|
|
static int dasync_cipher_ctrl_helper(EVP_CIPHER_CTX *ctx, int type, int arg,
|
|
void *ptr, int aeadcapable)
|
|
{
|
|
int ret;
|
|
struct dasync_pipeline_ctx *pipe_ctx =
|
|
(struct dasync_pipeline_ctx *)EVP_CIPHER_CTX_get_cipher_data(ctx);
|
|
|
|
if (pipe_ctx == NULL)
|
|
return 0;
|
|
|
|
switch (type) {
|
|
case EVP_CTRL_SET_PIPELINE_OUTPUT_BUFS:
|
|
pipe_ctx->numpipes = arg;
|
|
pipe_ctx->outbufs = (unsigned char **)ptr;
|
|
break;
|
|
|
|
case EVP_CTRL_SET_PIPELINE_INPUT_BUFS:
|
|
pipe_ctx->numpipes = arg;
|
|
pipe_ctx->inbufs = (unsigned char **)ptr;
|
|
break;
|
|
|
|
case EVP_CTRL_SET_PIPELINE_INPUT_LENS:
|
|
pipe_ctx->numpipes = arg;
|
|
pipe_ctx->lens = (size_t *)ptr;
|
|
break;
|
|
|
|
case EVP_CTRL_AEAD_SET_MAC_KEY:
|
|
if (!aeadcapable)
|
|
return -1;
|
|
EVP_CIPHER_CTX_set_cipher_data(ctx, pipe_ctx->inner_cipher_data);
|
|
ret = EVP_CIPHER_meth_get_ctrl(EVP_aes_128_cbc_hmac_sha1())
|
|
(ctx, type, arg, ptr);
|
|
EVP_CIPHER_CTX_set_cipher_data(ctx, pipe_ctx);
|
|
return ret;
|
|
|
|
case EVP_CTRL_AEAD_TLS1_AAD:
|
|
{
|
|
unsigned char *p = ptr;
|
|
unsigned int len;
|
|
|
|
if (!aeadcapable || arg != EVP_AEAD_TLS1_AAD_LEN)
|
|
return -1;
|
|
|
|
if (pipe_ctx->aadctr >= SSL_MAX_PIPELINES)
|
|
return -1;
|
|
|
|
memcpy(pipe_ctx->tlsaad[pipe_ctx->aadctr], ptr,
|
|
EVP_AEAD_TLS1_AAD_LEN);
|
|
pipe_ctx->aadctr++;
|
|
|
|
len = p[arg - 2] << 8 | p[arg - 1];
|
|
|
|
if (EVP_CIPHER_CTX_encrypting(ctx)) {
|
|
if ((p[arg - 4] << 8 | p[arg - 3]) >= TLS1_1_VERSION) {
|
|
if (len < AES_BLOCK_SIZE)
|
|
return 0;
|
|
len -= AES_BLOCK_SIZE;
|
|
}
|
|
|
|
return ((len + SHA_DIGEST_LENGTH + AES_BLOCK_SIZE)
|
|
& -AES_BLOCK_SIZE) - len;
|
|
} else {
|
|
return SHA_DIGEST_LENGTH;
|
|
}
|
|
}
|
|
|
|
default:
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int dasync_cipher_init_key_helper(EVP_CIPHER_CTX *ctx,
|
|
const unsigned char *key,
|
|
const unsigned char *iv, int enc,
|
|
const EVP_CIPHER *cipher)
|
|
{
|
|
int ret;
|
|
struct dasync_pipeline_ctx *pipe_ctx =
|
|
(struct dasync_pipeline_ctx *)EVP_CIPHER_CTX_get_cipher_data(ctx);
|
|
|
|
if (pipe_ctx->inner_cipher_data == NULL
|
|
&& EVP_CIPHER_impl_ctx_size(cipher) != 0) {
|
|
pipe_ctx->inner_cipher_data = OPENSSL_zalloc(
|
|
EVP_CIPHER_impl_ctx_size(cipher));
|
|
if (pipe_ctx->inner_cipher_data == NULL) {
|
|
DASYNCerr(DASYNC_F_DASYNC_CIPHER_INIT_KEY_HELPER,
|
|
ERR_R_MALLOC_FAILURE);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
pipe_ctx->numpipes = 0;
|
|
pipe_ctx->aadctr = 0;
|
|
|
|
EVP_CIPHER_CTX_set_cipher_data(ctx, pipe_ctx->inner_cipher_data);
|
|
ret = EVP_CIPHER_meth_get_init(cipher)(ctx, key, iv, enc);
|
|
EVP_CIPHER_CTX_set_cipher_data(ctx, pipe_ctx);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int dasync_cipher_helper(EVP_CIPHER_CTX *ctx, unsigned char *out,
|
|
const unsigned char *in, size_t inl,
|
|
const EVP_CIPHER *cipher)
|
|
{
|
|
int ret = 1;
|
|
unsigned int i, pipes;
|
|
struct dasync_pipeline_ctx *pipe_ctx =
|
|
(struct dasync_pipeline_ctx *)EVP_CIPHER_CTX_get_cipher_data(ctx);
|
|
|
|
pipes = pipe_ctx->numpipes;
|
|
EVP_CIPHER_CTX_set_cipher_data(ctx, pipe_ctx->inner_cipher_data);
|
|
if (pipes == 0) {
|
|
if (pipe_ctx->aadctr != 0) {
|
|
if (pipe_ctx->aadctr != 1)
|
|
return -1;
|
|
EVP_CIPHER_meth_get_ctrl(cipher)
|
|
(ctx, EVP_CTRL_AEAD_TLS1_AAD,
|
|
EVP_AEAD_TLS1_AAD_LEN,
|
|
pipe_ctx->tlsaad[0]);
|
|
}
|
|
ret = EVP_CIPHER_meth_get_do_cipher(cipher)
|
|
(ctx, out, in, inl);
|
|
} else {
|
|
if (pipe_ctx->aadctr > 0 && pipe_ctx->aadctr != pipes)
|
|
return -1;
|
|
for (i = 0; i < pipes; i++) {
|
|
if (pipe_ctx->aadctr > 0) {
|
|
EVP_CIPHER_meth_get_ctrl(cipher)
|
|
(ctx, EVP_CTRL_AEAD_TLS1_AAD,
|
|
EVP_AEAD_TLS1_AAD_LEN,
|
|
pipe_ctx->tlsaad[i]);
|
|
}
|
|
ret = ret && EVP_CIPHER_meth_get_do_cipher(cipher)
|
|
(ctx, pipe_ctx->outbufs[i], pipe_ctx->inbufs[i],
|
|
pipe_ctx->lens[i]);
|
|
}
|
|
pipe_ctx->numpipes = 0;
|
|
}
|
|
pipe_ctx->aadctr = 0;
|
|
EVP_CIPHER_CTX_set_cipher_data(ctx, pipe_ctx);
|
|
return ret;
|
|
}
|
|
|
|
static int dasync_cipher_cleanup_helper(EVP_CIPHER_CTX *ctx,
|
|
const EVP_CIPHER *cipher)
|
|
{
|
|
struct dasync_pipeline_ctx *pipe_ctx =
|
|
(struct dasync_pipeline_ctx *)EVP_CIPHER_CTX_get_cipher_data(ctx);
|
|
|
|
OPENSSL_clear_free(pipe_ctx->inner_cipher_data,
|
|
EVP_CIPHER_impl_ctx_size(cipher));
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* AES128 CBC Implementation
|
|
*/
|
|
|
|
static int dasync_aes128_cbc_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg,
|
|
void *ptr)
|
|
{
|
|
return dasync_cipher_ctrl_helper(ctx, type, arg, ptr, 0);
|
|
}
|
|
|
|
static int dasync_aes128_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
|
|
const unsigned char *iv, int enc)
|
|
{
|
|
return dasync_cipher_init_key_helper(ctx, key, iv, enc, EVP_aes_128_cbc());
|
|
}
|
|
|
|
static int dasync_aes128_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
|
|
const unsigned char *in, size_t inl)
|
|
{
|
|
return dasync_cipher_helper(ctx, out, in, inl, EVP_aes_128_cbc());
|
|
}
|
|
|
|
static int dasync_aes128_cbc_cleanup(EVP_CIPHER_CTX *ctx)
|
|
{
|
|
return dasync_cipher_cleanup_helper(ctx, EVP_aes_128_cbc());
|
|
}
|
|
|
|
|
|
/*
|
|
* AES128 CBC HMAC SHA1 Implementation
|
|
*/
|
|
|
|
static int dasync_aes128_cbc_hmac_sha1_ctrl(EVP_CIPHER_CTX *ctx, int type,
|
|
int arg, void *ptr)
|
|
{
|
|
return dasync_cipher_ctrl_helper(ctx, type, arg, ptr, 1);
|
|
}
|
|
|
|
static int dasync_aes128_cbc_hmac_sha1_init_key(EVP_CIPHER_CTX *ctx,
|
|
const unsigned char *key,
|
|
const unsigned char *iv,
|
|
int enc)
|
|
{
|
|
/*
|
|
* We can safely assume that EVP_aes_128_cbc_hmac_sha1() != NULL,
|
|
* see comment before the definition of dasync_aes_128_cbc_hmac_sha1().
|
|
*/
|
|
return dasync_cipher_init_key_helper(ctx, key, iv, enc,
|
|
EVP_aes_128_cbc_hmac_sha1());
|
|
}
|
|
|
|
static int dasync_aes128_cbc_hmac_sha1_cipher(EVP_CIPHER_CTX *ctx,
|
|
unsigned char *out,
|
|
const unsigned char *in,
|
|
size_t inl)
|
|
{
|
|
return dasync_cipher_helper(ctx, out, in, inl, EVP_aes_128_cbc_hmac_sha1());
|
|
}
|
|
|
|
static int dasync_aes128_cbc_hmac_sha1_cleanup(EVP_CIPHER_CTX *ctx)
|
|
{
|
|
/*
|
|
* We can safely assume that EVP_aes_128_cbc_hmac_sha1() != NULL,
|
|
* see comment before the definition of dasync_aes_128_cbc_hmac_sha1().
|
|
*/
|
|
return dasync_cipher_cleanup_helper(ctx, EVP_aes_128_cbc_hmac_sha1());
|
|
}
|