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ossl: Add Poly1305 digest support.

Browse Source 
Reviewed by:	cem
Sponsored by:	Netflix
Differential Revision:	https://reviews.freebsd.org/D28754
This commit is contained in:
John Baldwin 2021-03-03 15:17:29 -08:00
parent 442a293611
commit a079e38b08
10 changed files with 260 additions and 18 deletions
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4
share/man/man4/ossl.4
View File

@ -26,7 +26,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd December 4, 2020
.Dd March 3, 2021
.Dt OSSL 4
.Os
.Sh NAME
@ -74,6 +74,8 @@ driver includes support for the following algorithms:
.Pp
.Bl -bullet -compact
.It
Poly1305
.It
SHA1
.It
SHA1-HMAC

1
sys/conf/files
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@ -739,6 +739,7 @@ crypto/chacha20/chacha-sw.c optional crypto | ipsec | ipsec_support
crypto/des/des_ecb.c optional netsmb
crypto/des/des_setkey.c optional netsmb
crypto/openssl/ossl.c optional ossl
crypto/openssl/ossl_poly1305.c optional ossl
crypto/openssl/ossl_sha1.c optional ossl
crypto/openssl/ossl_sha256.c optional ossl
crypto/openssl/ossl_sha512.c optional ossl

1
sys/conf/files.amd64
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@ -137,6 +137,7 @@ cddl/dev/dtrace/amd64/dtrace_asm.S optional dtrace compile-with "${DTRACE_S}"
cddl/dev/dtrace/amd64/dtrace_subr.c optional dtrace compile-with "${DTRACE_C}"
crypto/aesni/aeskeys_amd64.S optional aesni
crypto/des/des_enc.c optional netsmb
crypto/openssl/amd64/poly1305-x86_64.S optional ossl
crypto/openssl/amd64/sha1-x86_64.S optional ossl
crypto/openssl/amd64/sha256-x86_64.S optional ossl
crypto/openssl/amd64/sha512-x86_64.S optional ossl

2
sys/conf/files.arm64
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@ -125,6 +125,8 @@ ghashv8-armx.o optional armv8crypto \
crypto/des/des_enc.c optional netsmb
crypto/openssl/ossl_aarch64.c optional ossl
crypto/openssl/aarch64/poly1305-armv8.S optional ossl \
compile-with "${CC} -c ${CFLAGS:N-mgeneral-regs-only} ${WERROR} ${PROF} ${.IMPSRC}"
crypto/openssl/aarch64/sha1-armv8.S optional ossl \
compile-with "${CC} -c ${CFLAGS:N-mgeneral-regs-only} ${WERROR} ${PROF} ${.IMPSRC}"
crypto/openssl/aarch64/sha256-armv8.S optional ossl \

1
sys/conf/files.i386
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@ -77,6 +77,7 @@ compat/linux/linux_vdso.c optional compat_linux
compat/linux/linux.c optional compat_linux
crypto/aesni/aeskeys_i386.S optional aesni
crypto/des/arch/i386/des_enc.S optional netsmb
crypto/openssl/i386/poly1305-x86.S optional ossl
crypto/openssl/i386/sha1-586.S optional ossl
crypto/openssl/i386/sha256-586.S optional ossl
crypto/openssl/i386/sha512-586.S optional ossl

46
sys/crypto/openssl/ossl.c
View File

@ -135,6 +135,8 @@ ossl_lookup_hash(const struct crypto_session_params *csp)
case CRYPTO_SHA2_512:
case CRYPTO_SHA2_512_HMAC:
return (&ossl_hash_sha512);
case CRYPTO_POLY1305:
return (&ossl_hash_poly1305);
default:
return (NULL);
}
@ -159,14 +161,6 @@ ossl_probesession(device_t dev, const struct crypto_session_params *csp)
return (CRYPTODEV_PROBE_ACCEL_SOFTWARE);
}
static void
ossl_setkey_hmac(struct ossl_session *s, const void *key, int klen)
{
hmac_init_ipad(s->hash.axf, key, klen, &s->hash.ictx);
hmac_init_opad(s->hash.axf, key, klen, &s->hash.octx);
}
static int
ossl_newsession(device_t dev, crypto_session_t cses,
const struct crypto_session_params *csp)
@ -188,8 +182,16 @@ ossl_newsession(device_t dev, crypto_session_t cses,
} else {
if (csp->csp_auth_key != NULL) {
fpu_kern_enter(curthread, NULL, FPU_KERN_NOCTX);
ossl_setkey_hmac(s, csp->csp_auth_key,
csp->csp_auth_klen);
if (axf->Setkey != NULL) {
axf->Init(&s->hash.ictx);
axf->Setkey(&s->hash.ictx, csp->csp_auth_key,
csp->csp_auth_klen);
} else {
hmac_init_ipad(axf, csp->csp_auth_key,
csp->csp_auth_klen, &s->hash.ictx);
hmac_init_opad(axf, csp->csp_auth_key,
csp->csp_auth_klen, &s->hash.octx);
}
fpu_kern_leave(curthread, NULL);
}
}
@ -218,10 +220,18 @@ ossl_process(device_t dev, struct cryptop *crp, int hint)
fpu_entered = true;
}
if (crp->crp_auth_key != NULL)
ossl_setkey_hmac(s, crp->crp_auth_key, csp->csp_auth_klen);
ctx = s->hash.ictx;
if (crp->crp_auth_key == NULL) {
ctx = s->hash.ictx;
} else {
if (axf->Setkey != NULL) {
axf->Init(&ctx);
axf->Setkey(&ctx, crp->crp_auth_key,
csp->csp_auth_klen);
} else {
hmac_init_ipad(axf, crp->crp_auth_key,
csp->csp_auth_klen, &ctx);
}
}
if (crp->crp_aad != NULL)
error = axf->Update(&ctx, crp->crp_aad, crp->crp_aad_length);
@ -238,8 +248,12 @@ ossl_process(device_t dev, struct cryptop *crp, int hint)
axf->Final(digest, &ctx);
if (csp->csp_auth_klen != 0) {
ctx = s->hash.octx;
if (csp->csp_auth_klen != 0 && axf->Setkey == NULL) {
if (crp->crp_auth_key == NULL)
ctx = s->hash.octx;
else
hmac_init_opad(axf, crp->crp_auth_key,
csp->csp_auth_klen, &ctx);
axf->Update(&ctx, digest, axf->hashsize);
axf->Final(digest, &ctx);
}

3
sys/crypto/openssl/ossl.h
View File

@ -38,9 +38,10 @@ void ossl_cpuid(void);
/* Needs to be big enough to hold any hash context. */
struct ossl_hash_context {
uint32_t dummy[54];
uint32_t dummy[61];
} __aligned(32);
extern struct auth_hash ossl_hash_poly1305;
extern struct auth_hash ossl_hash_sha1;
extern struct auth_hash ossl_hash_sha224;
extern struct auth_hash ossl_hash_sha256;

181
sys/crypto/openssl/ossl_poly1305.c Normal file
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@ -0,0 +1,181 @@
/*
* Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <sys/libkern.h>
#include <sys/malloc.h>
#include <opencrypto/cryptodev.h>
#include <opencrypto/xform_auth.h>
#include <crypto/openssl/ossl.h>
#include <crypto/openssl/ossl_poly1305.h>
#define POLY1305_ASM
/* From crypto/poly1305/poly1305.c */
/* pick 32-bit unsigned integer in little endian order */
static unsigned int U8TOU32(const unsigned char *p)
{
return (((unsigned int)(p[0] & 0xff)) |
((unsigned int)(p[1] & 0xff) << 8) |
((unsigned int)(p[2] & 0xff) << 16) |
((unsigned int)(p[3] & 0xff) << 24));
}
/*
* Implementations can be classified by amount of significant bits in
* words making up the multi-precision value, or in other words radix
* or base of numerical representation, e.g. base 2^64, base 2^32,
* base 2^26. Complementary characteristic is how wide is the result of
* multiplication of pair of digits, e.g. it would take 128 bits to
* accommodate multiplication result in base 2^64 case. These are used
* interchangeably. To describe implementation that is. But interface
* is designed to isolate this so that low-level primitives implemented
* in assembly can be self-contained/self-coherent.
*/
int poly1305_init(void *ctx, const unsigned char key[16], void *func);
void poly1305_blocks(void *ctx, const unsigned char *inp, size_t len,
unsigned int padbit);
void poly1305_emit(void *ctx, unsigned char mac[16],
const unsigned int nonce[4]);
static void Poly1305_Init(POLY1305 *ctx, const unsigned char key[32])
{
ctx->nonce[0] = U8TOU32(&key[16]);
ctx->nonce[1] = U8TOU32(&key[20]);
ctx->nonce[2] = U8TOU32(&key[24]);
ctx->nonce[3] = U8TOU32(&key[28]);
/*
* Unlike reference poly1305_init assembly counterpart is expected
* to return a value: non-zero if it initializes ctx->func, and zero
* otherwise. Latter is to simplify assembly in cases when there no
* multiple code paths to switch between.
*/
if (!poly1305_init(ctx->opaque, key, &ctx->func)) {
ctx->func.blocks = poly1305_blocks;
ctx->func.emit = poly1305_emit;
}
ctx->num = 0;
}
#ifdef POLY1305_ASM
/*
* This "eclipses" poly1305_blocks and poly1305_emit, but it's
* conscious choice imposed by -Wshadow compiler warnings.
*/
# define poly1305_blocks (*poly1305_blocks_p)
# define poly1305_emit (*poly1305_emit_p)
#endif
static void Poly1305_Update(POLY1305 *ctx, const unsigned char *inp, size_t len)
{
#ifdef POLY1305_ASM
/*
* As documented, poly1305_blocks is never called with input
* longer than single block and padbit argument set to 0. This
* property is fluently used in assembly modules to optimize
* padbit handling on loop boundary.
*/
poly1305_blocks_f poly1305_blocks_p = ctx->func.blocks;
#endif
size_t rem, num;
if ((num = ctx->num)) {
rem = POLY1305_BLOCK_SIZE - num;
if (len >= rem) {
memcpy(ctx->data + num, inp, rem);
poly1305_blocks(ctx->opaque, ctx->data, POLY1305_BLOCK_SIZE, 1);
inp += rem;
len -= rem;
} else {
/* Still not enough data to process a block. */
memcpy(ctx->data + num, inp, len);
ctx->num = num + len;
return;
}
}
rem = len % POLY1305_BLOCK_SIZE;
len -= rem;
if (len >= POLY1305_BLOCK_SIZE) {
poly1305_blocks(ctx->opaque, inp, len, 1);
inp += len;
}
if (rem)
memcpy(ctx->data, inp, rem);
ctx->num = rem;
}
static void Poly1305_Final(POLY1305 *ctx, unsigned char mac[16])
{
#ifdef POLY1305_ASM
poly1305_blocks_f poly1305_blocks_p = ctx->func.blocks;
poly1305_emit_f poly1305_emit_p = ctx->func.emit;
#endif
size_t num;
if ((num = ctx->num)) {
ctx->data[num++] = 1; /* pad bit */
while (num < POLY1305_BLOCK_SIZE)
ctx->data[num++] = 0;
poly1305_blocks(ctx->opaque, ctx->data, POLY1305_BLOCK_SIZE, 0);
}
poly1305_emit(ctx->opaque, mac, ctx->nonce);
/* zero out the state */
OPENSSL_cleanse(ctx, sizeof(*ctx));
}
static void
ossl_poly1305_init(void *vctx)
{
}
static void
ossl_poly1305_setkey(void *vctx, const uint8_t *key, u_int klen)
{
MPASS(klen == 32);
Poly1305_Init(vctx, key);
}
static int
ossl_poly1305_update(void *vctx, const void *buf, u_int len)
{
Poly1305_Update(vctx, buf, len);
return (0);
}
static void
ossl_poly1305_final(uint8_t *digest, void *vctx)
{
Poly1305_Final(vctx, digest);
}
struct auth_hash ossl_hash_poly1305 = {
.type = CRYPTO_POLY1305,
.name = "OpenSSL-Poly1305",
.hashsize = POLY1305_HASH_LEN,
.ctxsize = sizeof(struct poly1305_context),
.blocksize = POLY1305_BLOCK_SIZE,
.Init = ossl_poly1305_init,
.Setkey = ossl_poly1305_setkey,
.Update = ossl_poly1305_update,
.Final = ossl_poly1305_final,
};
_Static_assert(sizeof(struct poly1305_context) <=
sizeof(struct ossl_hash_context), "ossl_hash_context too small");

35
sys/crypto/openssl/ossl_poly1305.h Normal file
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@ -0,0 +1,35 @@
/*
* Copyright 2015-2016 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
/* From include/crypto/poly1305.h */
#define POLY1305_BLOCK_SIZE 16
typedef struct poly1305_context POLY1305;
/* From crypto/poly1305/poly1305_local.h */
typedef void (*poly1305_blocks_f) (void *ctx, const unsigned char *inp,
size_t len, unsigned int padbit);
typedef void (*poly1305_emit_f) (void *ctx, unsigned char mac[16],
const unsigned int nonce[4]);
struct poly1305_context {
double opaque[24]; /* large enough to hold internal state, declared
* 'double' to ensure at least 64-bit invariant
* alignment across all platforms and
* configurations */
unsigned int nonce[4];
unsigned char data[POLY1305_BLOCK_SIZE];
size_t num;
struct {
poly1305_blocks_f blocks;
poly1305_emit_f emit;
} func;
};

4
sys/modules/ossl/Makefile
View File

@ -8,24 +8,28 @@ SRCS= bus_if.h \
cryptodev_if.h \
device_if.h \
ossl.c \
ossl_poly1305.c \
ossl_sha1.c \
ossl_sha256.c \
ossl_sha512.c \
${SRCS.${MACHINE_CPUARCH}}
SRCS.aarch64= \
poly1305-armv8.S \
sha1-armv8.S \
sha256-armv8.S \
sha512-armv8.S \
ossl_aarch64.c
SRCS.amd64= \
poly1305-x86_64.S \
sha1-x86_64.S \
sha256-x86_64.S \
sha512-x86_64.S \
ossl_x86.c
SRCS.i386= \
poly1305-x86.S \
sha1-586.S \
sha256-586.S \
sha512-586.S \