mirror of
https://github.com/openssl/openssl.git
synced 2024-12-03 05:41:46 +08:00
888098304b
Reviewed-by: Andy Polyakov <appro@openssl.org> (Merged from https://github.com/openssl/openssl/pull/3740)
277 lines
7.5 KiB
C
277 lines
7.5 KiB
C
/*
|
|
* Copyright 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
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include "internal/cryptlib.h"
|
|
#include <openssl/kdf.h>
|
|
#include <openssl/evp.h>
|
|
#include "internal/evp_int.h"
|
|
|
|
static int tls1_prf_alg(const EVP_MD *md,
|
|
const unsigned char *sec, size_t slen,
|
|
const unsigned char *seed, size_t seed_len,
|
|
unsigned char *out, size_t olen);
|
|
|
|
#define TLS1_PRF_MAXBUF 1024
|
|
|
|
/* TLS KDF pkey context structure */
|
|
|
|
typedef struct {
|
|
/* Digest to use for PRF */
|
|
const EVP_MD *md;
|
|
/* Secret value to use for PRF */
|
|
unsigned char *sec;
|
|
size_t seclen;
|
|
/* Buffer of concatenated seed data */
|
|
unsigned char seed[TLS1_PRF_MAXBUF];
|
|
size_t seedlen;
|
|
} TLS1_PRF_PKEY_CTX;
|
|
|
|
static int pkey_tls1_prf_init(EVP_PKEY_CTX *ctx)
|
|
{
|
|
TLS1_PRF_PKEY_CTX *kctx;
|
|
|
|
kctx = OPENSSL_zalloc(sizeof(*kctx));
|
|
if (kctx == NULL)
|
|
return 0;
|
|
ctx->data = kctx;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static void pkey_tls1_prf_cleanup(EVP_PKEY_CTX *ctx)
|
|
{
|
|
TLS1_PRF_PKEY_CTX *kctx = ctx->data;
|
|
OPENSSL_clear_free(kctx->sec, kctx->seclen);
|
|
OPENSSL_cleanse(kctx->seed, kctx->seedlen);
|
|
OPENSSL_free(kctx);
|
|
}
|
|
|
|
static int pkey_tls1_prf_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
|
|
{
|
|
TLS1_PRF_PKEY_CTX *kctx = ctx->data;
|
|
switch (type) {
|
|
case EVP_PKEY_CTRL_TLS_MD:
|
|
kctx->md = p2;
|
|
return 1;
|
|
|
|
case EVP_PKEY_CTRL_TLS_SECRET:
|
|
if (p1 < 0)
|
|
return 0;
|
|
if (kctx->sec != NULL)
|
|
OPENSSL_clear_free(kctx->sec, kctx->seclen);
|
|
OPENSSL_cleanse(kctx->seed, kctx->seedlen);
|
|
kctx->seedlen = 0;
|
|
kctx->sec = OPENSSL_memdup(p2, p1);
|
|
if (kctx->sec == NULL)
|
|
return 0;
|
|
kctx->seclen = p1;
|
|
return 1;
|
|
|
|
case EVP_PKEY_CTRL_TLS_SEED:
|
|
if (p1 == 0 || p2 == NULL)
|
|
return 1;
|
|
if (p1 < 0 || p1 > (int)(TLS1_PRF_MAXBUF - kctx->seedlen))
|
|
return 0;
|
|
memcpy(kctx->seed + kctx->seedlen, p2, p1);
|
|
kctx->seedlen += p1;
|
|
return 1;
|
|
|
|
default:
|
|
return -2;
|
|
|
|
}
|
|
}
|
|
|
|
static int pkey_tls1_prf_ctrl_str(EVP_PKEY_CTX *ctx,
|
|
const char *type, const char *value)
|
|
{
|
|
if (value == NULL) {
|
|
KDFerr(KDF_F_PKEY_TLS1_PRF_CTRL_STR, KDF_R_VALUE_MISSING);
|
|
return 0;
|
|
}
|
|
if (strcmp(type, "md") == 0) {
|
|
TLS1_PRF_PKEY_CTX *kctx = ctx->data;
|
|
|
|
const EVP_MD *md = EVP_get_digestbyname(value);
|
|
if (md == NULL) {
|
|
KDFerr(KDF_F_PKEY_TLS1_PRF_CTRL_STR, KDF_R_INVALID_DIGEST);
|
|
return 0;
|
|
}
|
|
kctx->md = md;
|
|
return 1;
|
|
}
|
|
if (strcmp(type, "secret") == 0)
|
|
return EVP_PKEY_CTX_str2ctrl(ctx, EVP_PKEY_CTRL_TLS_SECRET, value);
|
|
if (strcmp(type, "hexsecret") == 0)
|
|
return EVP_PKEY_CTX_hex2ctrl(ctx, EVP_PKEY_CTRL_TLS_SECRET, value);
|
|
if (strcmp(type, "seed") == 0)
|
|
return EVP_PKEY_CTX_str2ctrl(ctx, EVP_PKEY_CTRL_TLS_SEED, value);
|
|
if (strcmp(type, "hexseed") == 0)
|
|
return EVP_PKEY_CTX_hex2ctrl(ctx, EVP_PKEY_CTRL_TLS_SEED, value);
|
|
|
|
KDFerr(KDF_F_PKEY_TLS1_PRF_CTRL_STR, KDF_R_UNKNOWN_PARAMETER_TYPE);
|
|
return -2;
|
|
}
|
|
|
|
static int pkey_tls1_prf_derive(EVP_PKEY_CTX *ctx, unsigned char *key,
|
|
size_t *keylen)
|
|
{
|
|
TLS1_PRF_PKEY_CTX *kctx = ctx->data;
|
|
if (kctx->md == NULL) {
|
|
KDFerr(KDF_F_PKEY_TLS1_PRF_DERIVE, KDF_R_MISSING_MESSAGE_DIGEST);
|
|
return 0;
|
|
}
|
|
if (kctx->sec == NULL) {
|
|
KDFerr(KDF_F_PKEY_TLS1_PRF_DERIVE, KDF_R_MISSING_SECRET);
|
|
return 0;
|
|
}
|
|
if (kctx->seedlen == 0) {
|
|
KDFerr(KDF_F_PKEY_TLS1_PRF_DERIVE, KDF_R_MISSING_SEED);
|
|
return 0;
|
|
}
|
|
return tls1_prf_alg(kctx->md, kctx->sec, kctx->seclen,
|
|
kctx->seed, kctx->seedlen,
|
|
key, *keylen);
|
|
}
|
|
|
|
const EVP_PKEY_METHOD tls1_prf_pkey_meth = {
|
|
EVP_PKEY_TLS1_PRF,
|
|
0,
|
|
pkey_tls1_prf_init,
|
|
0,
|
|
pkey_tls1_prf_cleanup,
|
|
|
|
0, 0,
|
|
0, 0,
|
|
|
|
0,
|
|
0,
|
|
|
|
0,
|
|
0,
|
|
|
|
0, 0,
|
|
|
|
0, 0, 0, 0,
|
|
|
|
0, 0,
|
|
|
|
0, 0,
|
|
|
|
0,
|
|
pkey_tls1_prf_derive,
|
|
pkey_tls1_prf_ctrl,
|
|
pkey_tls1_prf_ctrl_str
|
|
};
|
|
|
|
static int tls1_prf_P_hash(const EVP_MD *md,
|
|
const unsigned char *sec, size_t sec_len,
|
|
const unsigned char *seed, size_t seed_len,
|
|
unsigned char *out, size_t olen)
|
|
{
|
|
int chunk;
|
|
EVP_MD_CTX *ctx = NULL, *ctx_tmp = NULL, *ctx_init = NULL;
|
|
EVP_PKEY *mac_key = NULL;
|
|
unsigned char A1[EVP_MAX_MD_SIZE];
|
|
size_t A1_len;
|
|
int ret = 0;
|
|
|
|
chunk = EVP_MD_size(md);
|
|
if (!ossl_assert(chunk > 0))
|
|
goto err;
|
|
|
|
ctx = EVP_MD_CTX_new();
|
|
ctx_tmp = EVP_MD_CTX_new();
|
|
ctx_init = EVP_MD_CTX_new();
|
|
if (ctx == NULL || ctx_tmp == NULL || ctx_init == NULL)
|
|
goto err;
|
|
EVP_MD_CTX_set_flags(ctx_init, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
|
|
mac_key = EVP_PKEY_new_mac_key(EVP_PKEY_HMAC, NULL, sec, sec_len);
|
|
if (mac_key == NULL)
|
|
goto err;
|
|
if (!EVP_DigestSignInit(ctx_init, NULL, md, NULL, mac_key))
|
|
goto err;
|
|
if (!EVP_MD_CTX_copy_ex(ctx, ctx_init))
|
|
goto err;
|
|
if (seed != NULL && !EVP_DigestSignUpdate(ctx, seed, seed_len))
|
|
goto err;
|
|
if (!EVP_DigestSignFinal(ctx, A1, &A1_len))
|
|
goto err;
|
|
|
|
for (;;) {
|
|
/* Reinit mac contexts */
|
|
if (!EVP_MD_CTX_copy_ex(ctx, ctx_init))
|
|
goto err;
|
|
if (!EVP_DigestSignUpdate(ctx, A1, A1_len))
|
|
goto err;
|
|
if (olen > (size_t)chunk && !EVP_MD_CTX_copy_ex(ctx_tmp, ctx))
|
|
goto err;
|
|
if (seed && !EVP_DigestSignUpdate(ctx, seed, seed_len))
|
|
goto err;
|
|
|
|
if (olen > (size_t)chunk) {
|
|
size_t mac_len;
|
|
if (!EVP_DigestSignFinal(ctx, out, &mac_len))
|
|
goto err;
|
|
out += mac_len;
|
|
olen -= mac_len;
|
|
/* calc the next A1 value */
|
|
if (!EVP_DigestSignFinal(ctx_tmp, A1, &A1_len))
|
|
goto err;
|
|
} else { /* last one */
|
|
|
|
if (!EVP_DigestSignFinal(ctx, A1, &A1_len))
|
|
goto err;
|
|
memcpy(out, A1, olen);
|
|
break;
|
|
}
|
|
}
|
|
ret = 1;
|
|
err:
|
|
EVP_PKEY_free(mac_key);
|
|
EVP_MD_CTX_free(ctx);
|
|
EVP_MD_CTX_free(ctx_tmp);
|
|
EVP_MD_CTX_free(ctx_init);
|
|
OPENSSL_cleanse(A1, sizeof(A1));
|
|
return ret;
|
|
}
|
|
|
|
static int tls1_prf_alg(const EVP_MD *md,
|
|
const unsigned char *sec, size_t slen,
|
|
const unsigned char *seed, size_t seed_len,
|
|
unsigned char *out, size_t olen)
|
|
{
|
|
|
|
if (EVP_MD_type(md) == NID_md5_sha1) {
|
|
size_t i;
|
|
unsigned char *tmp;
|
|
if (!tls1_prf_P_hash(EVP_md5(), sec, slen/2 + (slen & 1),
|
|
seed, seed_len, out, olen))
|
|
return 0;
|
|
|
|
tmp = OPENSSL_malloc(olen);
|
|
if (tmp == NULL)
|
|
return 0;
|
|
if (!tls1_prf_P_hash(EVP_sha1(), sec + slen/2, slen/2 + (slen & 1),
|
|
seed, seed_len, tmp, olen)) {
|
|
OPENSSL_clear_free(tmp, olen);
|
|
return 0;
|
|
}
|
|
for (i = 0; i < olen; i++)
|
|
out[i] ^= tmp[i];
|
|
OPENSSL_clear_free(tmp, olen);
|
|
return 1;
|
|
}
|
|
if (!tls1_prf_P_hash(md, sec, slen, seed, seed_len, out, olen))
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|