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Merge d212450f58 into a7534300bb

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wllm-rbnt 2024-10-25 14:32:06 +02:00 committed by GitHub
commit cb7066478e
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2 changed files with 105 additions and 68 deletions
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39
ssl/ssl_rec.c
View file

@ -412,42 +412,53 @@ static int tls_check_mac(ssl_rec_decoder *d,
UCHAR *iv, UCHAR *iv,
UINT4 ivlen, UINT4 ivlen,
UCHAR *mac) { UCHAR *mac) {
HMAC_CTX *hm = HMAC_CTX_new();
if(!hm)
ERETURN(R_NO_MEMORY);
const EVP_MD *md; const EVP_MD *md;
UINT4 l; size_t l;
UCHAR buf[128]; UCHAR buf[128];
OSSL_PARAM params[2];
EVP_MAC *hmac = EVP_MAC_fetch(NULL, "HMAC", NULL);
EVP_MAC_CTX *mac_ctx = EVP_MAC_CTX_new(hmac);
EVP_MAC_free(hmac);
if(!mac_ctx)
ERETURN(R_NO_MEMORY);
md = EVP_get_digestbyname(digests[d->cs->dig - 0x40]); md = EVP_get_digestbyname(digests[d->cs->dig - 0x40]);
HMAC_Init_ex(hm, d->mac_key->data, d->mac_key->len, md, NULL); if(!md)
ERETURN(R_NOT_FOUND);
params[0] = OSSL_PARAM_construct_utf8_string("digest", digests[d->cs->dig - 0x40], 0);
params[1] = OSSL_PARAM_construct_end();
EVP_MAC_init(mac_ctx, d->mac_key->data, d->mac_key->len, params);
fmt_seq(d->seq, buf); fmt_seq(d->seq, buf);
d->seq++; d->seq++;
HMAC_Update(hm, buf, 8); EVP_MAC_update(mac_ctx, buf, 8);
buf[0] = ct; buf[0] = ct;
HMAC_Update(hm, buf, 1); EVP_MAC_update(mac_ctx, buf, 1);
buf[0] = MSB(ver); buf[0] = MSB(ver);
buf[1] = LSB(ver); buf[1] = LSB(ver);
HMAC_Update(hm, buf, 2); EVP_MAC_update(mac_ctx, buf, 2);
buf[0] = MSB(datalen); buf[0] = MSB(datalen);
buf[1] = LSB(datalen); buf[1] = LSB(datalen);
HMAC_Update(hm, buf, 2); EVP_MAC_update(mac_ctx, buf, 2);
/* for encrypt-then-mac with an explicit IV */ /* for encrypt-then-mac with an explicit IV */
if(ivlen && iv) { if(ivlen && iv) {
HMAC_Update(hm, iv, ivlen); EVP_MAC_update(mac_ctx, iv, ivlen);
HMAC_Update(hm, data, datalen - ivlen); EVP_MAC_update(mac_ctx, data, datalen - ivlen);
} else } else
HMAC_Update(hm, data, datalen); EVP_MAC_update(mac_ctx, data, datalen);
HMAC_Final(hm, buf, &l); EVP_MAC_final(mac_ctx, buf, &l, sizeof(buf));
if(memcmp(mac, buf, l)) if(memcmp(mac, buf, l))
ERETURN(SSL_BAD_MAC); ERETURN(SSL_BAD_MAC);
HMAC_CTX_free(hm); EVP_MAC_CTX_free(mac_ctx);
return 0; return 0;
} }

134
ssl/ssldecode.c
View file

@ -108,7 +108,7 @@ struct ssl_decoder_ {
#ifdef OPENSSL #ifdef OPENSSL
static int tls_P_hash PROTO_LIST( static int tls_P_hash PROTO_LIST(
(ssl_obj * ssl, Data *secret, Data *seed, const EVP_MD *md, Data *out)); (ssl_obj * ssl, Data *secret, Data *seed, char *md_name, Data *out));
static int tls12_prf PROTO_LIST((ssl_obj * ssl, static int tls12_prf PROTO_LIST((ssl_obj * ssl,
Data *secret, Data *secret,
char *usage, char *usage,
@ -613,9 +613,9 @@ int ssl_process_client_key_exchange(ssl_obj *ssl,
int len) { int len) {
#ifdef OPENSSL #ifdef OPENSSL
int r, _status; int r, _status;
int i; size_t i;
EVP_PKEY *pk; EVP_PKEY *pk;
const BIGNUM *n; BIGNUM *n;
/* Remove the master secret if it was there /* Remove the master secret if it was there
to force keying material regeneration in to force keying material regeneration in
@ -636,12 +636,15 @@ int ssl_process_client_key_exchange(ssl_obj *ssl,
if(EVP_PKEY_id(pk) != EVP_PKEY_RSA) if(EVP_PKEY_id(pk) != EVP_PKEY_RSA)
return -1; return -1;
RSA_get0_key(EVP_PKEY_get0_RSA(pk), &n, NULL, NULL); EVP_PKEY_get_bn_param(pk, "priv", &n);
if((r = r_data_alloc(&d->PMS, BN_num_bytes(n)))) if((r = r_data_alloc(&d->PMS, BN_num_bytes(n))))
ABORT(r); ABORT(r);
i = RSA_private_decrypt(len, msg, d->PMS->data, EVP_PKEY_get0_RSA(pk), EVP_PKEY_CTX *ctx = EVP_PKEY_CTX_new(pk, NULL);
RSA_PKCS1_PADDING); EVP_PKEY_decrypt_init(ctx);
EVP_PKEY_decrypt(ctx, d->PMS->data, &i, msg, len);
EVP_PKEY_CTX_free(ctx);
EVP_PKEY_free(pk);
if(i != 48) if(i != 48)
ABORT(SSL_BAD_PMS); ABORT(SSL_BAD_PMS);
@ -680,15 +683,22 @@ abort:
static int tls_P_hash(ssl_obj *ssl, static int tls_P_hash(ssl_obj *ssl,
Data *secret, Data *secret,
Data *seed, Data *seed,
const EVP_MD *md, char *md_name,
Data *out) { Data *out) {
UCHAR *ptr = out->data; UCHAR *ptr = out->data;
int left = out->len; int left = out->len;
int tocpy; int tocpy;
UCHAR *A; UCHAR *A;
UCHAR _A[128], tmp[128]; UCHAR _A[128], tmp[128];
unsigned int A_l, tmp_l; size_t A_l, tmp_l;
HMAC_CTX *hm = HMAC_CTX_new();
OSSL_PARAM params[2];
EVP_MAC *hmac = EVP_MAC_fetch(NULL, "HMAC", NULL);
EVP_MAC_CTX *mac_ctx = EVP_MAC_CTX_new(hmac);
EVP_MAC_free(hmac);
params[0] = OSSL_PARAM_construct_utf8_string("digest", md_name, 0);
params[1] = OSSL_PARAM_construct_end();
CRDUMPD("P_hash secret", secret); CRDUMPD("P_hash secret", secret);
CRDUMPD("P_hash seed", seed); CRDUMPD("P_hash seed", seed);
@ -697,15 +707,15 @@ static int tls_P_hash(ssl_obj *ssl,
A_l = seed->len; A_l = seed->len;
while(left) { while(left) {
HMAC_Init_ex(hm, secret->data, secret->len, md, NULL); EVP_MAC_init(mac_ctx, secret->data, secret->len, params);
HMAC_Update(hm, A, A_l); EVP_MAC_update(mac_ctx, A, A_l);
HMAC_Final(hm, _A, &A_l); EVP_MAC_final(mac_ctx, (unsigned char *) &_A, &A_l, sizeof(_A));
A = _A; A = _A;
HMAC_Init_ex(hm, secret->data, secret->len, md, NULL); EVP_MAC_init(mac_ctx, secret->data, secret->len, params);
HMAC_Update(hm, A, A_l); EVP_MAC_update(mac_ctx, A, A_l);
HMAC_Update(hm, seed->data, seed->len); EVP_MAC_update(mac_ctx, seed->data, seed->len);
HMAC_Final(hm, tmp, &tmp_l); EVP_MAC_final(mac_ctx, (unsigned char *) &tmp, &tmp_l, sizeof(tmp));
tocpy = MIN(left, tmp_l); tocpy = MIN(left, tmp_l);
memcpy(ptr, tmp, tocpy); memcpy(ptr, tmp, tocpy);
@ -713,7 +723,7 @@ static int tls_P_hash(ssl_obj *ssl,
left -= tocpy; left -= tocpy;
} }
HMAC_CTX_free(hm); EVP_MAC_CTX_free(mac_ctx);
CRDUMPD("P_hash out", out); CRDUMPD("P_hash out", out);
return 0; return 0;
@ -756,9 +766,9 @@ static int tls_prf(ssl_obj *ssl,
memcpy(S1->data, secret->data, S_l); memcpy(S1->data, secret->data, S_l);
memcpy(S2->data, secret->data + (secret->len - S_l), S_l); memcpy(S2->data, secret->data + (secret->len - S_l), S_l);
if((r = tls_P_hash(ssl, S1, seed, EVP_get_digestbyname("MD5"), md5_out))) if((r = tls_P_hash(ssl, S1, seed, "MD5", md5_out)))
ABORT(r); ABORT(r);
if((r = tls_P_hash(ssl, S2, seed, EVP_get_digestbyname("SHA1"), sha_out))) if((r = tls_P_hash(ssl, S2, seed, "SHA1", sha_out)))
ABORT(r); ABORT(r);
for(i = 0; i < out->len; i++) for(i = 0; i < out->len; i++)
@ -810,7 +820,7 @@ static int tls12_prf(ssl_obj *ssl,
digests[dgi])); digests[dgi]));
ERETURN(SSL_BAD_MAC); ERETURN(SSL_BAD_MAC);
} }
if((r = tls_P_hash(ssl, secret, seed, md, sha_out))) if((r = tls_P_hash(ssl, secret, seed, digests[dgi], sha_out)))
ABORT(r); ABORT(r);
for(i = 0; i < out->len; i++) for(i = 0; i < out->len; i++)
@ -828,15 +838,18 @@ static int ssl3_generate_export_iv(ssl_obj *ssl,
Data *r1, Data *r1,
Data *r2, Data *r2,
Data *out) { Data *out) {
MD5_CTX md5;
UCHAR tmp[16]; UCHAR tmp[16];
unsigned int tmp_len;
MD5_Init(&md5); EVP_MD_CTX *mdctx;
MD5_Update(&md5, r1->data, r1->len); mdctx = EVP_MD_CTX_new();
MD5_Update(&md5, r2->data, r2->len); EVP_DigestInit(mdctx, EVP_get_digestbyname("MD5"));
MD5_Final(tmp, &md5); EVP_DigestUpdate(mdctx, r1->data, r1->len);
EVP_DigestUpdate(mdctx, r2->data, r2->len);
EVP_DigestFinal_ex(mdctx, tmp, &tmp_len);
EVP_MD_CTX_free(mdctx);
memcpy(out->data, tmp, out->len); memcpy(out->data, tmp, tmp_len);
return 0; return 0;
} }
@ -847,12 +860,13 @@ static int ssl3_prf(ssl_obj *ssl,
Data *r1, Data *r1,
Data *r2, Data *r2,
Data *out) { Data *out) {
MD5_CTX md5; EVP_MD_CTX *md5_ctx;
SHA_CTX sha; EVP_MD_CTX *sha1_ctx;
Data *rnd1, *rnd2; Data *rnd1, *rnd2;
int off; int off;
int i = 0, j; int i = 0, j;
UCHAR buf[20]; UCHAR buf[20];
unsigned int buf_len;
rnd1 = r1; rnd1 = r1;
rnd2 = r2; rnd2 = r2;
@ -861,12 +875,14 @@ static int ssl3_prf(ssl_obj *ssl,
CRDUMPD("RND1", rnd1); CRDUMPD("RND1", rnd1);
CRDUMPD("RND2", rnd2); CRDUMPD("RND2", rnd2);
MD5_Init(&md5); md5_ctx = EVP_MD_CTX_new();
memset(&sha, 0, sizeof(sha)); EVP_DigestInit(md5_ctx, EVP_get_digestbyname("MD5"));
SHA1_Init(&sha); sha1_ctx = EVP_MD_CTX_new();
EVP_DigestInit(sha1_ctx, EVP_get_digestbyname("SHA1"));
for(off = 0; off < out->len; off += 16) { for(off = 0; off < out->len; off += 16) {
char outbuf[16]; char outbuf[16];
unsigned int outbuf_len;
int tocpy; int tocpy;
i++; i++;
@ -875,38 +891,43 @@ static int ssl3_prf(ssl_obj *ssl,
buf[j] = 64 + i; buf[j] = 64 + i;
} }
SHA1_Update(&sha, buf, i); EVP_DigestUpdate(sha1_ctx, buf, i);
CRDUMP("BUF", buf, i); CRDUMP("BUF", buf, i);
if(secret) if(secret)
SHA1_Update(&sha, secret->data, secret->len); EVP_DigestUpdate(sha1_ctx, secret->data, secret->len);
CRDUMPD("secret", secret); CRDUMPD("secret", secret);
if(!strcmp(usage, "client write key") || if(!strcmp(usage, "client write key") ||
!strcmp(usage, "server write key")) { !strcmp(usage, "server write key")) {
SHA1_Update(&sha, rnd2->data, rnd2->len); EVP_DigestUpdate(sha1_ctx, rnd2->data, rnd2->len);
CRDUMPD("rnd2", rnd2); CRDUMPD("rnd2", rnd2);
SHA1_Update(&sha, rnd1->data, rnd1->len); EVP_DigestUpdate(sha1_ctx, rnd1->data, rnd1->len);
CRDUMPD("rnd1", rnd1); CRDUMPD("rnd1", rnd1);
} else { } else {
SHA1_Update(&sha, rnd1->data, rnd1->len); EVP_DigestUpdate(sha1_ctx, rnd1->data, rnd1->len);
CRDUMPD("rnd1", rnd1); CRDUMPD("rnd1", rnd1);
SHA1_Update(&sha, rnd2->data, rnd2->len); EVP_DigestUpdate(sha1_ctx, rnd2->data, rnd2->len);
CRDUMPD("rnd2", rnd2); CRDUMPD("rnd2", rnd2);
} }
SHA1_Final(buf, &sha); EVP_DigestFinal_ex(sha1_ctx, buf, &buf_len);
EVP_MD_CTX_free(sha1_ctx);
CRDUMP("SHA out", buf, 20); CRDUMP("SHA out", buf, 20);
SHA1_Init(&sha); sha1_ctx = EVP_MD_CTX_new();
EVP_DigestInit(sha1_ctx, EVP_get_digestbyname("SHA1"));
MD5_Update(&md5, secret->data, secret->len); EVP_DigestUpdate(md5_ctx, secret->data, secret->len);
MD5_Update(&md5, buf, 20); EVP_DigestUpdate(md5_ctx, buf, 20);
MD5_Final((unsigned char *)outbuf, &md5); EVP_DigestFinal_ex(md5_ctx, outbuf, &outbuf_len);
EVP_MD_CTX_free(md5_ctx);
tocpy = MIN(out->len - off, 16); tocpy = MIN(out->len - off, 16);
memcpy(out->data + off, outbuf, tocpy); memcpy(out->data + off, outbuf, tocpy);
CRDUMP("MD5 out", (UCHAR *)outbuf, 16); CRDUMP("MD5 out", (UCHAR *)outbuf, 16);
MD5_Init(&md5); md5_ctx = EVP_MD_CTX_new();
EVP_DigestInit(md5_ctx, EVP_get_digestbyname("MD5"));
} }
return 0; return 0;
@ -916,6 +937,7 @@ static int ssl_generate_keying_material(ssl_obj *ssl, ssl_decoder *d) {
Data *key_block = 0, temp; Data *key_block = 0, temp;
UCHAR _iv_c[8], _iv_s[8]; UCHAR _iv_c[8], _iv_s[8];
UCHAR _key_c[16], _key_s[16]; UCHAR _key_c[16], _key_s[16];
unsigned int _key_c_len, _key_s_len;
int needed; int needed;
int r, _status; int r, _status;
UCHAR *ptr, *c_wk, *s_wk, *c_mk = NULL, *s_mk = NULL, *c_iv = NULL, UCHAR *ptr, *c_wk, *s_wk, *c_mk = NULL, *s_mk = NULL, *c_iv = NULL,
@ -1019,20 +1041,24 @@ static int ssl_generate_keying_material(ssl_obj *ssl, ssl_decoder *d) {
} }
if(ssl->version == SSLV3_VERSION) { if(ssl->version == SSLV3_VERSION) {
MD5_CTX md5;
MD5_Init(&md5); EVP_MD_CTX *mdctx;
MD5_Update(&md5, c_wk, ssl->cs->eff_bits / 8); mdctx = EVP_MD_CTX_new();
MD5_Update(&md5, d->client_random->data, d->client_random->len); EVP_DigestInit(mdctx, EVP_get_digestbyname("MD5"));
MD5_Update(&md5, d->server_random->data, d->server_random->len); EVP_DigestUpdate(mdctx, c_wk, ssl->cs->eff_bits / 8);
MD5_Final(_key_c, &md5); EVP_DigestUpdate(mdctx, d->client_random->data, d->client_random->len);
EVP_DigestUpdate(mdctx, d->server_random->data, d->server_random->len);
EVP_DigestFinal_ex(mdctx, _key_c, &_key_c_len);
EVP_MD_CTX_free(mdctx);
c_wk = _key_c; c_wk = _key_c;
MD5_Init(&md5); mdctx = EVP_MD_CTX_new();
MD5_Update(&md5, s_wk, ssl->cs->eff_bits / 8); EVP_DigestInit(mdctx, EVP_get_digestbyname("MD5"));
MD5_Update(&md5, d->server_random->data, d->server_random->len); EVP_DigestUpdate(mdctx, s_wk, ssl->cs->eff_bits / 8);
MD5_Update(&md5, d->client_random->data, d->client_random->len); EVP_DigestUpdate(mdctx, d->server_random->data, d->server_random->len);
MD5_Final(_key_s, &md5); EVP_DigestUpdate(mdctx, d->client_random->data, d->client_random->len);
EVP_DigestFinal_ex(mdctx, _key_s, &_key_s_len);
EVP_MD_CTX_free(mdctx);
s_wk = _key_s; s_wk = _key_s;
} else { } else {
ATTACH_DATA(key_c, _key_c); ATTACH_DATA(key_c, _key_c);