static int
ssl3_md5(int i, uint8_t * secret, int secret_len,
uint8_t * rnd, int rnd_len, void *digest)
{
uint8_t tmp[MAX_HASH_SIZE];
digest_hd_st td;
int ret;
ret = _gnutls_hash_init(&td, mac_to_entry(GNUTLS_MAC_MD5));
if (ret < 0) {
gnutls_assert();
return ret;
}
_gnutls_hash(&td, secret, secret_len);
ret = ssl3_sha(i, secret, secret_len, rnd, rnd_len, tmp);
if (ret < 0) {
gnutls_assert();
_gnutls_hash_deinit(&td, digest);
return ret;
}
_gnutls_hash(&td, tmp, SHA1_DIGEST_OUTPUT);
_gnutls_hash_deinit(&td, digest);
return 0;
}
/* generate x = SHA(s | SHA(U | ":" | p))
* The output is exactly 20 bytes
*/
int
_gnutls_calc_srp_sha (const char *username, const char *password,
opaque * salt, int salt_size, size_t * size,
void *digest)
{
GNUTLS_HASH_HANDLE td;
opaque res[MAX_HASH_SIZE];
*size = 20;
td = _gnutls_hash_init (GNUTLS_MAC_SHA1);
if (td == NULL)
{
return GNUTLS_E_MEMORY_ERROR;
}
_gnutls_hash (td, username, strlen (username));
_gnutls_hash (td, ":", 1);
_gnutls_hash (td, password, strlen (password));
_gnutls_hash_deinit (td, res);
td = _gnutls_hash_init (GNUTLS_MAC_SHA1);
if (td == NULL)
{
return GNUTLS_E_MEMORY_ERROR;
}
_gnutls_hash (td, salt, salt_size);
_gnutls_hash (td, res, 20); /* 20 bytes is the output of sha1 */
_gnutls_hash_deinit (td, digest);
return 0;
}
/* generate x = SHA(s | SHA(U | ":" | p))
* The output is exactly 20 bytes
*/
static int
_gnutls_calc_srp_sha(const char *username, const char *password,
uint8_t * salt, int salt_size, size_t * size,
void *digest)
{
digest_hd_st td;
uint8_t res[MAX_HASH_SIZE];
int ret;
const mac_entry_st *me = mac_to_entry(GNUTLS_MAC_SHA1);
*size = 20;
ret = _gnutls_hash_init(&td, me);
if (ret < 0) {
return GNUTLS_E_MEMORY_ERROR;
}
_gnutls_hash(&td, username, strlen(username));
_gnutls_hash(&td, ":", 1);
_gnutls_hash(&td, password, strlen(password));
_gnutls_hash_deinit(&td, res);
ret = _gnutls_hash_init(&td, me);
if (ret < 0) {
return GNUTLS_E_MEMORY_ERROR;
}
_gnutls_hash(&td, salt, salt_size);
_gnutls_hash(&td, res, 20); /* 20 bytes is the output of sha1 */
_gnutls_hash_deinit(&td, digest);
return 0;
}
static int
openssl_hash_password(const char *pass, gnutls_datum_t * key,
gnutls_datum_t * salt)
{
unsigned char md5[16];
digest_hd_st hd;
unsigned int count = 0;
int err;
while (count < key->size) {
err = _gnutls_hash_init(&hd, mac_to_entry(GNUTLS_MAC_MD5));
if (err) {
gnutls_assert();
return err;
}
if (count) {
err = _gnutls_hash(&hd, md5, sizeof(md5));
if (err) {
hash_err:
_gnutls_hash_deinit(&hd, NULL);
gnutls_assert();
return err;
}
}
if (pass) {
err = _gnutls_hash(&hd, pass, strlen(pass));
if (err) {
gnutls_assert();
goto hash_err;
}
}
err = _gnutls_hash(&hd, salt->data, 8);
if (err) {
gnutls_assert();
goto hash_err;
}
_gnutls_hash_deinit(&hd, md5);
if (key->size - count <= sizeof(md5)) {
memcpy(&key->data[count], md5, key->size - count);
break;
}
memcpy(&key->data[count], md5, sizeof(md5));
count += sizeof(md5);
}
return 0;
}
int
_gnutls_mac_deinit_ssl3_handshake(digest_hd_st * handle,
void *digest, uint8_t * key,
uint32_t key_size)
{
uint8_t ret[MAX_HASH_SIZE];
digest_hd_st td;
uint8_t opad[48];
uint8_t ipad[48];
int padsize;
int block, rc;
padsize = get_padsize(handle->e->id);
if (padsize == 0) {
gnutls_assert();
rc = GNUTLS_E_INTERNAL_ERROR;
goto cleanup;
}
memset(opad, 0x5C, padsize);
memset(ipad, 0x36, padsize);
rc = _gnutls_hash_init(&td, handle->e);
if (rc < 0) {
gnutls_assert();
goto cleanup;
}
if (key_size > 0)
_gnutls_hash(&td, key, key_size);
_gnutls_hash(&td, opad, padsize);
block = _gnutls_mac_get_algo_len(handle->e);
if (key_size > 0)
_gnutls_hash(handle, key, key_size);
_gnutls_hash(handle, ipad, padsize);
_gnutls_hash_deinit(handle, ret); /* get the previous hash */
_gnutls_hash(&td, ret, block);
_gnutls_hash_deinit(&td, digest);
return 0;
cleanup:
_gnutls_hash_deinit(handle, NULL);
return rc;
}
/* Hashes input data and verifies a DSA signature.
*/
static int
dsa_verify_sig (const gnutls_datum_t * text,
const gnutls_datum_t * hash,
const gnutls_datum_t * signature, bigint_t * params,
int params_len)
{
int ret;
opaque _digest[MAX_HASH_SIZE];
gnutls_datum_t digest;
digest_hd_st hd;
if (hash && hash->data && hash->size == 20)
{
digest = *hash;
}
else
{
ret = _gnutls_hash_init (&hd, GNUTLS_MAC_SHA1);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
_gnutls_hash (&hd, text->data, text->size);
_gnutls_hash_deinit (&hd, _digest);
digest.data = _digest;
digest.size = 20;
}
ret = _gnutls_dsa_verify (&digest, signature, params, params_len);
return ret;
}
static int
dsa_sign (const gnutls_datum_t * text,
bigint_t * params, int params_len, gnutls_datum_t * signature)
{
int ret;
opaque _digest[MAX_HASH_SIZE];
digest_hd_st hd;
gnutls_datum_t digest;
gnutls_digest_algorithm_t hash = _gnutls_dsa_q_to_hash (params[1]);
ret = _gnutls_hash_init (&hd, hash);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
_gnutls_hash (&hd, text->data, text->size);
_gnutls_hash_deinit (&hd, _digest);
digest.data = _digest;
digest.size = _gnutls_hash_get_algo_len (hash);
if ((ret =
_gnutls_sign (GNUTLS_PK_DSA, params, params_len, &digest,
signature)) < 0)
{
gnutls_assert ();
return ret;
}
return 0;
}
static int
ssl3_sha(int i, uint8_t * secret, int secret_len,
uint8_t * rnd, int rnd_len, void *digest)
{
int j, ret;
uint8_t text1[26];
digest_hd_st td;
for (j = 0; j < i + 1; j++) {
text1[j] = 65 + i; /* A==65 */
}
ret = _gnutls_hash_init(&td, mac_to_entry(GNUTLS_MAC_SHA1));
if (ret < 0) {
gnutls_assert();
return ret;
}
_gnutls_hash(&td, text1, i + 1);
_gnutls_hash(&td, secret, secret_len);
_gnutls_hash(&td, rnd, rnd_len);
_gnutls_hash_deinit(&td, digest);
return 0;
}
int
_gnutls_ssl3_hash_md5(const void *first, int first_len,
const void *second, int second_len,
int ret_len, uint8_t * ret)
{
uint8_t digest[MAX_HASH_SIZE];
digest_hd_st td;
int block = MD5_DIGEST_OUTPUT;
int rc;
rc = _gnutls_hash_init(&td, mac_to_entry(GNUTLS_MAC_MD5));
if (rc < 0) {
gnutls_assert();
return rc;
}
_gnutls_hash(&td, first, first_len);
_gnutls_hash(&td, second, second_len);
_gnutls_hash_deinit(&td, digest);
if (ret_len > block) {
gnutls_assert();
return GNUTLS_E_INTERNAL_ERROR;
}
memcpy(ret, digest, ret_len);
return 0;
}
/**
* cdk_pk_get_fingerprint:
* @pk: the public key
* @fpr: the buffer to hold the fingerprint
*
* Return the fingerprint of the given public key.
* The buffer must be at least 20 octets.
* This function should be considered deprecated and
* the new cdk_pk_to_fingerprint() should be used whenever
* possible to avoid overflows.
**/
cdk_error_t
cdk_pk_get_fingerprint (cdk_pubkey_t pk, byte * fpr)
{
digest_hd_st hd;
int md_algo;
int dlen = 0;
int err;
if (!pk || !fpr)
return CDK_Inv_Value;
if (pk->version < 4 && is_RSA (pk->pubkey_algo))
md_algo = GNUTLS_DIG_MD5; /* special */
else
md_algo = GNUTLS_DIG_SHA1;
dlen = _gnutls_hash_get_algo_len (md_algo);
err = _gnutls_hash_init (&hd, md_algo);
if (err < 0)
{
gnutls_assert ();
return map_gnutls_error (err);
}
_cdk_hash_pubkey (pk, &hd, 1);
_gnutls_hash_deinit (&hd, fpr);
if (dlen == 16)
memset (fpr + 16, 0, 4);
return 0;
}
static int
dsa_sign (const gnutls_datum_t * text,
mpi_t * params, int params_len, gnutls_datum_t * signature)
{
int ret;
opaque _digest[MAX_HASH_SIZE];
GNUTLS_HASH_HANDLE hd;
gnutls_datum_t digest;
hd = _gnutls_hash_init (GNUTLS_MAC_SHA1);
if (hd == NULL)
{
gnutls_assert ();
return GNUTLS_E_HASH_FAILED;
}
_gnutls_hash (hd, text->data, text->size);
_gnutls_hash_deinit (hd, _digest);
digest.data = _digest;
digest.size = 20;
if ((ret =
_gnutls_sign (GNUTLS_PK_DSA, params, params_len, &digest,
signature)) < 0)
{
gnutls_assert ();
return ret;
}
return 0;
}
/* this is _gnutls_handshake_verify_cert_vrfy for TLS 1.2
*/
static int
_gnutls_handshake_verify_cert_vrfy12 (gnutls_session_t session,
gnutls_pcert_st* cert,
gnutls_datum_t * signature,
gnutls_sign_algorithm_t sign_algo)
{
int ret;
opaque concat[MAX_SIG_SIZE];
digest_hd_st td;
gnutls_datum_t dconcat;
gnutls_sign_algorithm_t _sign_algo;
gnutls_digest_algorithm_t hash_algo;
digest_hd_st *handshake_td;
gnutls_protocol_t ver = gnutls_protocol_get_version (session);
gnutls_pk_algorithm_t pk = gnutls_pubkey_get_pk_algorithm(cert->pubkey, NULL);
handshake_td = &session->internals.handshake_mac_handle.tls12.sha1;
hash_algo = handshake_td->algorithm;
_sign_algo =
_gnutls_x509_pk_to_sign (pk, hash_algo);
if (_sign_algo != sign_algo)
{
handshake_td = &session->internals.handshake_mac_handle.tls12.sha256;
hash_algo = handshake_td->algorithm;
_sign_algo =
_gnutls_x509_pk_to_sign (pk, hash_algo);
if (sign_algo != _sign_algo)
{
gnutls_assert ();
return GNUTLS_E_UNSUPPORTED_SIGNATURE_ALGORITHM;
}
}
ret = _gnutls_hash_copy (&td, handshake_td);
if (ret < 0)
{
gnutls_assert ();
return GNUTLS_E_HASH_FAILED;
}
_gnutls_hash_deinit (&td, concat);
dconcat.data = concat;
dconcat.size = _gnutls_hash_get_algo_len (hash_algo);
ret =
verify_tls_hash (ver, cert, &dconcat, signature, 0, pk);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
return ret;
}
int _gnutls_mac_deinit_ssl3(digest_hd_st * handle, void *digest)
{
int ret = 0;
if (digest != NULL)
ret = _gnutls_mac_output_ssl3(handle, digest);
_gnutls_hash_deinit(handle, NULL);
return ret;
}
/* the same as _gnutls_handshake_sign_cert_vrfy except that it is made for TLS 1.2
*/
static int
_gnutls_handshake_sign_cert_vrfy12 (gnutls_session_t session,
gnutls_pcert_st* cert, gnutls_privkey_t pkey,
gnutls_datum_t * signature)
{
gnutls_datum_t dconcat;
int ret;
opaque concat[MAX_SIG_SIZE];
digest_hd_st td;
gnutls_sign_algorithm_t sign_algo;
gnutls_digest_algorithm_t hash_algo;
digest_hd_st *handshake_td;
sign_algo =
_gnutls_session_get_sign_algo (session, cert);
if (sign_algo == GNUTLS_SIGN_UNKNOWN)
{
gnutls_assert ();
return GNUTLS_E_UNKNOWN_PK_ALGORITHM;
}
hash_algo = _gnutls_sign_get_hash_algorithm (sign_algo);
_gnutls_debug_log ("sign handshake cert vrfy: picked %s with %s\n",
gnutls_sign_algorithm_get_name (sign_algo),
gnutls_mac_get_name (hash_algo));
if ((gnutls_mac_algorithm_t)hash_algo == session->internals.handshake_mac_handle.tls12.sha1.algorithm)
handshake_td = &session->internals.handshake_mac_handle.tls12.sha1;
else if ((gnutls_mac_algorithm_t)hash_algo == session->internals.handshake_mac_handle.tls12.sha256.algorithm)
handshake_td = &session->internals.handshake_mac_handle.tls12.sha256;
else
return gnutls_assert_val(GNUTLS_E_INTERNAL_ERROR); /* too bad we only support SHA1 and SHA256 */
ret = _gnutls_hash_copy (&td, handshake_td);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
_gnutls_hash_deinit (&td, concat);
dconcat.data = concat;
dconcat.size = _gnutls_hash_get_algo_len (hash_algo);
ret = sign_tls_hash (session, hash_algo, cert, pkey, &dconcat, signature);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
return sign_algo;
}
/* This calculates the SHA1(A | B)
* A and B will be left-padded with zeros to fill n_size.
*/
mpi_t
_gnutls_calc_srp_u (mpi_t A, mpi_t B, mpi_t n)
{
size_t b_size, a_size;
opaque *holder, hd[MAX_HASH_SIZE];
size_t holder_size, hash_size, n_size;
GNUTLS_HASH_HANDLE td;
int ret;
mpi_t res;
/* get the size of n in bytes */
_gnutls_mpi_print (NULL, &n_size, n);
_gnutls_mpi_print (NULL, &a_size, A);
_gnutls_mpi_print (NULL, &b_size, B);
if (a_size > n_size || b_size > n_size)
{
gnutls_assert ();
return NULL; /* internal error */
}
holder_size = n_size + n_size;
holder = gnutls_calloc (1, holder_size);
if (holder == NULL)
return NULL;
_gnutls_mpi_print (&holder[n_size - a_size], &a_size, A);
_gnutls_mpi_print (&holder[n_size + n_size - b_size], &b_size, B);
td = _gnutls_hash_init (GNUTLS_MAC_SHA1);
if (td == NULL)
{
gnutls_free (holder);
gnutls_assert ();
return NULL;
}
_gnutls_hash (td, holder, holder_size);
_gnutls_hash_deinit (td, hd);
/* convert the bytes of hd to integer
*/
hash_size = 20; /* SHA */
ret = _gnutls_mpi_scan_nz (&res, hd, &hash_size);
gnutls_free (holder);
if (ret < 0)
{
gnutls_assert ();
return NULL;
}
return res;
}
/* Hashes input data and verifies a DSA signature.
*/
static int
dsa_verify_sig (const gnutls_datum_t * text,
const gnutls_datum_t * hash,
const gnutls_datum_t * signature, bigint_t * params,
int params_len)
{
int ret;
opaque _digest[MAX_HASH_SIZE];
gnutls_datum_t digest;
digest_hd_st hd;
gnutls_digest_algorithm_t algo;
unsigned int hash_len;
algo = _gnutls_dsa_q_to_hash (params[1], &hash_len);
if (hash)
{
/* SHA1 or better allowed */
if (!hash->data || hash->size < hash_len)
{
gnutls_assert();
_gnutls_debug_log("Hash size (%d) does not correspond to hash %s", (int)hash->size, gnutls_mac_get_name(algo));
if (hash->size != 20)
return GNUTLS_E_PK_SIG_VERIFY_FAILED;
}
digest = *hash;
}
else
{
ret = _gnutls_hash_init (&hd, algo);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
_gnutls_hash (&hd, text->data, text->size);
_gnutls_hash_deinit (&hd, _digest);
digest.data = _digest;
digest.size = _gnutls_hash_get_algo_len(algo);
}
ret = _gnutls_dsa_verify (&digest, signature, params, params_len);
return ret;
}
/* if hash==MD5 then we do RSA-MD5
* if hash==SHA then we do RSA-SHA
* params[0] is modulus
* params[1] is public key
*/
static int
pkcs1_rsa_sign (gnutls_digest_algorithm_t hash, const gnutls_datum_t * text,
bigint_t * params, int params_len, gnutls_datum_t * signature)
{
int ret;
opaque _digest[MAX_HASH_SIZE];
digest_hd_st hd;
gnutls_datum_t digest, info;
ret = _gnutls_hash_init (&hd, HASH2MAC (hash));
if (ret < 0)
{
gnutls_assert ();
return ret;
}
_gnutls_hash (&hd, text->data, text->size);
_gnutls_hash_deinit (&hd, _digest);
digest.data = _digest;
digest.size = _gnutls_hash_get_algo_len (HASH2MAC (hash));
/* Encode the digest as a DigestInfo
*/
if ((ret = encode_ber_digest_info (hash, &digest, &info)) != 0)
{
gnutls_assert ();
return ret;
}
if ((ret =
_gnutls_sign (GNUTLS_PK_RSA, params, params_len, &info,
signature)) < 0)
{
gnutls_assert ();
_gnutls_free_datum (&info);
return ret;
}
_gnutls_free_datum (&info);
return 0;
}
cdk_error_t
_cdk_filter_hash (void *data, int ctl, FILE * in, FILE * out)
{
if (ctl == STREAMCTL_READ)
return hash_encode (data, in, out);
else if (ctl == STREAMCTL_FREE)
{
md_filter_t *mfx = data;
if (mfx)
{
_cdk_log_debug ("free hash filter\n");
_gnutls_hash_deinit (&mfx->md, NULL);
mfx->md_initialized = 0;
return 0;
}
}
gnutls_assert ();
return CDK_Inv_Mode;
}
int _gnutls_mac_output_ssl3(digest_hd_st * handle, void *digest)
{
uint8_t ret[MAX_HASH_SIZE];
digest_hd_st td;
uint8_t opad[48];
int padsize;
int block, rc;
padsize = get_padsize(handle->e->id);
if (padsize == 0) {
gnutls_assert();
return GNUTLS_E_INTERNAL_ERROR;
}
memset(opad, 0x5C, padsize);
rc = _gnutls_hash_init(&td, handle->e);
if (rc < 0) {
gnutls_assert();
return rc;
}
if (handle->keysize > 0)
_gnutls_hash(&td, handle->key, handle->keysize);
_gnutls_hash(&td, opad, padsize);
block = _gnutls_mac_get_algo_len(handle->e);
_gnutls_hash_output(handle, ret); /* get the previous hash */
_gnutls_hash(&td, ret, block);
_gnutls_hash_deinit(&td, digest);
/* reset handle */
memset(opad, 0x36, padsize);
if (handle->keysize > 0)
_gnutls_hash(handle, handle->key, handle->keysize);
_gnutls_hash(handle, opad, padsize);
return 0;
}
/* Generates a signature of all the random data and the parameters.
* Used in DHE_* ciphersuites.
*/
int
_gnutls_verify_sig_params (gnutls_session_t session, gnutls_cert * cert,
const gnutls_datum_t * params,
gnutls_datum_t * signature)
{
gnutls_datum_t dconcat;
int ret;
digest_hd_st td_md5;
digest_hd_st td_sha;
opaque concat[36];
gnutls_protocol_t ver = gnutls_protocol_get_version (session);
if (ver < GNUTLS_TLS1_2)
{
ret = _gnutls_hash_init (&td_md5, GNUTLS_MAC_MD5);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
_gnutls_hash (&td_md5, session->security_parameters.client_random,
GNUTLS_RANDOM_SIZE);
_gnutls_hash (&td_md5, session->security_parameters.server_random,
GNUTLS_RANDOM_SIZE);
_gnutls_hash (&td_md5, params->data, params->size);
}
ret = _gnutls_hash_init (&td_sha, GNUTLS_MAC_SHA1);
if (ret < 0)
{
gnutls_assert ();
if (ver < GNUTLS_TLS1_2)
_gnutls_hash_deinit (&td_md5, NULL);
return ret;
}
_gnutls_hash (&td_sha, session->security_parameters.client_random,
GNUTLS_RANDOM_SIZE);
_gnutls_hash (&td_sha, session->security_parameters.server_random,
GNUTLS_RANDOM_SIZE);
_gnutls_hash (&td_sha, params->data, params->size);
if (ver < GNUTLS_TLS1_2)
{
_gnutls_hash_deinit (&td_md5, concat);
_gnutls_hash_deinit (&td_sha, &concat[16]);
dconcat.size = 36;
}
else
{
#if 1
/* Use NULL parameters. */
memcpy (concat,
"\x30\x21\x30\x09\x06\x05\x2b\x0e\x03\x02\x1a\x05\x00\x04\x14",
15);
_gnutls_hash_deinit (&td_sha, &concat[15]);
dconcat.size = 35;
#else
/* No parameters field. */
memcpy (concat,
"\x30\x1f\x30\x07\x06\x05\x2b\x0e\x03\x02\x1a\x04\x14", 13);
_gnutls_hash_deinit (&td_sha, &concat[13]);
dconcat.size = 33;
#endif
}
dconcat.data = concat;
ret = _gnutls_verify_sig (cert, &dconcat, signature, dconcat.size - 20);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
return ret;
}
/* Generates a signature of all the previous sent packets in the
* handshake procedure. (20040227: now it works for SSL 3.0 as well)
*/
int
_gnutls_tls_sign_hdata (gnutls_session_t session,
gnutls_cert * cert, gnutls_privkey * pkey,
gnutls_datum_t * signature)
{
gnutls_datum_t dconcat;
int ret;
opaque concat[36];
digest_hd_st td_md5;
digest_hd_st td_sha;
gnutls_protocol_t ver = gnutls_protocol_get_version (session);
ret =
_gnutls_hash_copy (&td_sha, &session->internals.handshake_mac_handle_sha);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
if (ver == GNUTLS_SSL3)
{
ret = _gnutls_generate_master (session, 1);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
_gnutls_mac_deinit_ssl3_handshake (&td_sha, &concat[16],
session->security_parameters.
master_secret, GNUTLS_MASTER_SIZE);
}
else
_gnutls_hash_deinit (&td_sha, &concat[16]);
switch (cert->subject_pk_algorithm)
{
case GNUTLS_PK_RSA:
ret =
_gnutls_hash_copy (&td_md5,
&session->internals.handshake_mac_handle_md5);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
if (ver == GNUTLS_SSL3)
_gnutls_mac_deinit_ssl3_handshake (&td_md5, concat,
session->security_parameters.
master_secret, GNUTLS_MASTER_SIZE);
else
_gnutls_hash_deinit (&td_md5, concat);
dconcat.data = concat;
dconcat.size = 36;
break;
case GNUTLS_PK_DSA:
dconcat.data = &concat[16];
dconcat.size = 20;
break;
default:
gnutls_assert ();
return GNUTLS_E_INTERNAL_ERROR;
}
ret = _gnutls_tls_sign (session, cert, pkey, &dconcat, signature);
if (ret < 0)
{
gnutls_assert ();
}
return ret;
}
void
RIPEMD160_Final (unsigned char *md, RIPEMD160_CTX * ctx)
{
_gnutls_hash_deinit (ctx->handle, md);
gnutls_free (ctx->handle);
}
void
MD5_Final (unsigned char *md, MD5_CTX * ctx)
{
_gnutls_hash_deinit (ctx->handle, md);
gnutls_free (ctx->handle);
}
/**
* gnutls_x509_privkey_get_key_id - Return unique ID of the key's parameters
* @key: Holds the key
* @flags: should be 0 for now
* @output_data: will contain the key ID
* @output_data_size: holds the size of output_data (and will be
* replaced by the actual size of parameters)
*
* This function will return a unique ID the depends on the public key
* parameters. This ID can be used in checking whether a certificate
* corresponds to the given key.
*
* If the buffer provided is not long enough to hold the output, then
* *output_data_size is updated and GNUTLS_E_SHORT_MEMORY_BUFFER will
* be returned. The output will normally be a SHA-1 hash output,
* which is 20 bytes.
*
* Return value: In case of failure a negative value will be
* returned, and 0 on success.
*
**/
int
gnutls_x509_privkey_get_key_id (gnutls_x509_privkey_t key,
unsigned int flags,
unsigned char *output_data,
size_t * output_data_size)
{
int result;
GNUTLS_HASH_HANDLE hd;
gnutls_datum_t der = { NULL, 0 };
if (key == NULL || key->crippled)
{
gnutls_assert ();
return GNUTLS_E_INVALID_REQUEST;
}
if (*output_data_size < 20)
{
gnutls_assert ();
*output_data_size = 20;
return GNUTLS_E_SHORT_MEMORY_BUFFER;
}
if (key->pk_algorithm == GNUTLS_PK_RSA)
{
result =
_gnutls_x509_write_rsa_params (key->params, key->params_size, &der);
if (result < 0)
{
gnutls_assert ();
goto cleanup;
}
}
else if (key->pk_algorithm == GNUTLS_PK_DSA)
{
result =
_gnutls_x509_write_dsa_public_key (key->params,
key->params_size, &der);
if (result < 0)
{
gnutls_assert ();
goto cleanup;
}
}
else
return GNUTLS_E_INTERNAL_ERROR;
hd = _gnutls_hash_init (GNUTLS_MAC_SHA1);
if (hd == GNUTLS_HASH_FAILED)
{
gnutls_assert ();
result = GNUTLS_E_INTERNAL_ERROR;
goto cleanup;
}
_gnutls_hash (hd, der.data, der.size);
_gnutls_hash_deinit (hd, output_data);
*output_data_size = 20;
result = 0;
cleanup:
_gnutls_free_datum (&der);
return result;
}
/* ID should be:
* 3 for MAC
* 2 for IV
* 1 for encryption key
*
* Note that this function produces different key for the
* NULL password, and for the password with zero length.
*/
int
_gnutls_pkcs12_string_to_key(const mac_entry_st * me,
unsigned int id, const uint8_t * salt,
unsigned int salt_size, unsigned int iter,
const char *pw, unsigned int req_keylen,
uint8_t * keybuf)
{
int rc;
unsigned int i, j;
digest_hd_st md;
bigint_t num_b1 = NULL, num_ij = NULL;
bigint_t mpi512 = NULL;
unsigned int pwlen;
uint8_t hash[MAX_HASH_SIZE], buf_b[64], buf_i[MAX_PASS_LEN * 2 + 64], *p;
uint8_t d[64];
size_t cur_keylen;
size_t n, m, p_size, i_size;
unsigned mac_len;
const uint8_t buf_512[] = /* 2^64 */
{ 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00
};
cur_keylen = 0;
if (pw == NULL)
pwlen = 0;
else
pwlen = strlen(pw);
if (pwlen > MAX_PASS_LEN) {
gnutls_assert();
return GNUTLS_E_INVALID_REQUEST;
}
if ((rc = _pkcs12_check_pass(pw, pwlen)) < 0) {
gnutls_assert();
return rc;
}
rc = _gnutls_mpi_init_scan(&mpi512, buf_512, sizeof(buf_512));
if (rc < 0) {
gnutls_assert();
return rc;
}
/* Store salt and password in BUF_I */
p_size = ((pwlen / 64) * 64) + 64;
if (p_size > sizeof(buf_i) - 64)
return gnutls_assert_val(GNUTLS_E_INVALID_REQUEST);
p = buf_i;
for (i = 0; i < 64; i++)
*p++ = salt[i % salt_size];
if (pw) {
for (i = j = 0; i < p_size; i += 2) {
*p++ = 0;
*p++ = pw[j];
if (++j > pwlen) /* Note, that we include the trailing (0) */
j = 0;
}
} else
memset(p, 0, p_size);
i_size = 64 + p_size;
mac_len = _gnutls_mac_get_algo_len(me);
for (;;) {
rc = _gnutls_hash_init(&md, me);
if (rc < 0) {
gnutls_assert();
goto cleanup;
}
memset(d, id & 0xff, 64);
_gnutls_hash(&md, d, 64);
_gnutls_hash(&md, buf_i, pw ? i_size : 64);
_gnutls_hash_deinit(&md, hash);
for (i = 1; i < iter; i++) {
rc = _gnutls_hash_fast(me->id, hash, mac_len,
hash);
if (rc < 0) {
gnutls_assert();
goto cleanup;
}
}
for (i = 0; i < mac_len && cur_keylen < req_keylen; i++)
keybuf[cur_keylen++] = hash[i];
if (cur_keylen == req_keylen) {
rc = 0; /* ready */
goto cleanup;
}
/* need more bytes. */
for (i = 0; i < 64; i++)
buf_b[i] = hash[i % mac_len];
n = 64;
rc = _gnutls_mpi_init_scan(&num_b1, buf_b, n);
if (rc < 0) {
gnutls_assert();
goto cleanup;
}
rc = _gnutls_mpi_add_ui(num_b1, num_b1, 1);
if (rc < 0) {
gnutls_assert();
goto cleanup;
}
for (i = 0; i < 128; i += 64) {
n = 64;
rc = _gnutls_mpi_init_scan(&num_ij, buf_i + i, n);
if (rc < 0) {
gnutls_assert();
goto cleanup;
}
rc = _gnutls_mpi_addm(num_ij, num_ij, num_b1, mpi512);
if (rc < 0) {
gnutls_assert();
goto cleanup;
}
n = 64;
#ifndef PKCS12_BROKEN_KEYGEN
m = (_gnutls_mpi_get_nbits(num_ij) + 7) / 8;
#else
m = n;
#endif
memset(buf_i + i, 0, n - m);
rc = _gnutls_mpi_print(num_ij, buf_i + i + n - m,
&n);
if (rc < 0) {
gnutls_assert();
goto cleanup;
}
_gnutls_mpi_release(&num_ij);
}
}
cleanup:
_gnutls_mpi_release(&num_ij);
_gnutls_mpi_release(&num_b1);
_gnutls_mpi_release(&mpi512);
return rc;
}
/* Generates a signature of all the random data and the parameters.
* Used in DHE_* ciphersuites.
*/
int
_gnutls_tls_sign_params (gnutls_session_t session, gnutls_cert * cert,
gnutls_privkey * pkey, gnutls_datum_t * params,
gnutls_datum_t * signature)
{
gnutls_datum_t dconcat;
int ret;
digest_hd_st td_sha;
opaque concat[36];
gnutls_protocol_t ver = gnutls_protocol_get_version (session);
ret = _gnutls_hash_init (&td_sha, GNUTLS_MAC_SHA1);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
_gnutls_hash (&td_sha, session->security_parameters.client_random,
GNUTLS_RANDOM_SIZE);
_gnutls_hash (&td_sha, session->security_parameters.server_random,
GNUTLS_RANDOM_SIZE);
_gnutls_hash (&td_sha, params->data, params->size);
switch (cert->subject_pk_algorithm)
{
case GNUTLS_PK_RSA:
if (ver < GNUTLS_TLS1_2)
{
digest_hd_st td_md5;
ret = _gnutls_hash_init (&td_md5, GNUTLS_MAC_MD5);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
_gnutls_hash (&td_md5, session->security_parameters.client_random,
GNUTLS_RANDOM_SIZE);
_gnutls_hash (&td_md5, session->security_parameters.server_random,
GNUTLS_RANDOM_SIZE);
_gnutls_hash (&td_md5, params->data, params->size);
_gnutls_hash_deinit (&td_md5, concat);
_gnutls_hash_deinit (&td_sha, &concat[16]);
dconcat.size = 36;
}
else
{
#if 1
/* Use NULL parameters. */
memcpy (concat,
"\x30\x21\x30\x09\x06\x05\x2b\x0e\x03\x02\x1a\x05\x00\x04\x14",
15);
_gnutls_hash_deinit (&td_sha, &concat[15]);
dconcat.size = 35;
#else
/* No parameters field. */
memcpy (concat,
"\x30\x1f\x30\x07\x06\x05\x2b\x0e\x03\x02\x1a\x04\x14", 13);
_gnutls_hash_deinit (&td_sha, &concat[13]);
dconcat.size = 33;
#endif
}
dconcat.data = concat;
break;
case GNUTLS_PK_DSA:
_gnutls_hash_deinit (&td_sha, concat);
dconcat.data = concat;
dconcat.size = 20;
break;
default:
gnutls_assert ();
_gnutls_hash_deinit (&td_sha, NULL);
return GNUTLS_E_INTERNAL_ERROR;
}
ret = _gnutls_tls_sign (session, cert, pkey, &dconcat, signature);
if (ret < 0)
{
gnutls_assert ();
}
return ret;
}
/* if hash==MD5 then we do RSA-MD5
* if hash==SHA then we do RSA-SHA
* params[0] is modulus
* params[1] is public key
*/
static int
_pkcs1_rsa_verify_sig (const gnutls_datum_t * text,
const gnutls_datum_t * prehash,
const gnutls_datum_t * signature, bigint_t * params,
int params_len)
{
gnutls_mac_algorithm_t hash = GNUTLS_MAC_UNKNOWN;
int ret;
opaque digest[MAX_HASH_SIZE], md[MAX_HASH_SIZE], *cmp;
int digest_size;
digest_hd_st hd;
gnutls_datum_t decrypted;
ret =
_gnutls_pkcs1_rsa_decrypt (&decrypted, signature, params, params_len, 1);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
/* decrypted is a BER encoded data of type DigestInfo
*/
digest_size = sizeof (digest);
if ((ret =
decode_ber_digest_info (&decrypted, &hash, digest, &digest_size)) != 0)
{
gnutls_assert ();
_gnutls_free_datum (&decrypted);
return ret;
}
_gnutls_free_datum (&decrypted);
if (digest_size != _gnutls_hash_get_algo_len (hash))
{
gnutls_assert ();
return GNUTLS_E_ASN1_GENERIC_ERROR;
}
if (prehash && prehash->data && prehash->size == digest_size)
{
cmp = prehash->data;
}
else
{
if (!text)
{
gnutls_assert ();
return GNUTLS_E_INVALID_REQUEST;
}
ret = _gnutls_hash_init (&hd, hash);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
_gnutls_hash (&hd, text->data, text->size);
_gnutls_hash_deinit (&hd, md);
cmp = md;
}
if (memcmp (cmp, digest, digest_size) != 0)
{
gnutls_assert ();
return GNUTLS_E_PK_SIG_VERIFY_FAILED;
}
return 0;
}
/* ID should be:
* 3 for MAC
* 2 for IV
* 1 for encryption key
*/
int
_gnutls_pkcs12_string_to_key (unsigned int id, const opaque * salt,
unsigned int salt_size, unsigned int iter,
const char *pw, unsigned int req_keylen,
opaque * keybuf)
{
int rc;
unsigned int i, j;
digest_hd_st md;
bigint_t num_b1 = NULL, num_ij = NULL;
bigint_t mpi512 = NULL;
unsigned int pwlen;
opaque hash[20], buf_b[64], buf_i[128], *p;
size_t cur_keylen;
size_t n;
const opaque buf_512[] = /* 2^64 */
{ 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
cur_keylen = 0;
if (pw == NULL)
pwlen = 0;
else
pwlen = strlen (pw);
if (pwlen > 63 / 2)
{
gnutls_assert ();
return GNUTLS_E_INVALID_REQUEST;
}
if ((rc = _pkcs12_check_pass (pw, pwlen)) < 0)
{
gnutls_assert ();
return rc;
}
rc = _gnutls_mpi_scan (&mpi512, buf_512, sizeof (buf_512));
if (rc < 0)
{
gnutls_assert ();
return rc;
}
/* Store salt and password in BUF_I */
p = buf_i;
for (i = 0; i < 64; i++)
*p++ = salt[i % salt_size];
if (pw)
{
for (i = j = 0; i < 64; i += 2)
{
*p++ = 0;
*p++ = pw[j];
if (++j > pwlen) /* Note, that we include the trailing zero */
j = 0;
}
}
else
memset (p, 0, 64);
for (;;)
{
rc = _gnutls_hash_init (&md, GNUTLS_MAC_SHA1);
if (rc < 0)
{
gnutls_assert ();
goto cleanup;
}
for (i = 0; i < 64; i++)
{
unsigned char lid = id & 0xFF;
_gnutls_hash (&md, &lid, 1);
}
_gnutls_hash (&md, buf_i, pw ? 128 : 64);
_gnutls_hash_deinit (&md, hash);
for (i = 1; i < iter; i++)
{
rc = _gnutls_hash_init (&md, GNUTLS_MAC_SHA1);
if (rc < 0)
{
gnutls_assert ();
goto cleanup;
}
_gnutls_hash (&md, hash, 20);
_gnutls_hash_deinit (&md, hash);
}
for (i = 0; i < 20 && cur_keylen < req_keylen; i++)
keybuf[cur_keylen++] = hash[i];
if (cur_keylen == req_keylen)
{
rc = 0; /* ready */
goto cleanup;
}
/* need more bytes. */
for (i = 0; i < 64; i++)
buf_b[i] = hash[i % 20];
n = 64;
rc = _gnutls_mpi_scan (&num_b1, buf_b, n);
if (rc < 0)
{
gnutls_assert ();
goto cleanup;
}
_gnutls_mpi_add_ui (num_b1, num_b1, 1);
for (i = 0; i < 128; i += 64)
{
n = 64;
rc = _gnutls_mpi_scan (&num_ij, buf_i + i, n);
if (rc < 0)
{
gnutls_assert ();
goto cleanup;
}
_gnutls_mpi_addm (num_ij, num_ij, num_b1, mpi512);
n = 64;
rc = _gnutls_mpi_print (num_ij, buf_i + i, &n);
if (rc < 0)
{
gnutls_assert ();
goto cleanup;
}
_gnutls_mpi_release (&num_ij);
}
}
cleanup:
_gnutls_mpi_release (&num_ij);
_gnutls_mpi_release (&num_b1);
_gnutls_mpi_release (&mpi512);
return rc;
}
/* Verifies a TLS signature (like the one in the client certificate
* verify message).
*/
int
_gnutls_verify_sig_hdata (gnutls_session_t session, gnutls_cert * cert,
gnutls_datum_t * signature)
{
int ret;
opaque concat[36];
digest_hd_st td_md5;
digest_hd_st td_sha;
gnutls_datum_t dconcat;
gnutls_protocol_t ver = gnutls_protocol_get_version (session);
ret =
_gnutls_hash_copy (&td_md5, &session->internals.handshake_mac_handle_md5);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
ret =
_gnutls_hash_copy (&td_sha, &session->internals.handshake_mac_handle_sha);
if (ret < 0)
{
gnutls_assert ();
_gnutls_hash_deinit (&td_md5, NULL);
return GNUTLS_E_HASH_FAILED;
}
if (ver == GNUTLS_SSL3)
{
ret = _gnutls_generate_master (session, 1);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
_gnutls_mac_deinit_ssl3_handshake (&td_md5, concat,
session->security_parameters.
master_secret, GNUTLS_MASTER_SIZE);
_gnutls_mac_deinit_ssl3_handshake (&td_sha, &concat[16],
session->security_parameters.
master_secret, GNUTLS_MASTER_SIZE);
}
else
{
_gnutls_hash_deinit (&td_md5, concat);
_gnutls_hash_deinit (&td_sha, &concat[16]);
}
dconcat.data = concat;
dconcat.size = 20 + 16; /* md5+ sha */
ret = _gnutls_verify_sig (cert, &dconcat, signature, 16);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
return ret;
}
static cdk_error_t
file_verify_clearsign (cdk_ctx_t hd, const char *file, const char *output)
{
cdk_stream_t inp = NULL, out = NULL, tmp = NULL;
digest_hd_st md;
char buf[512], chk[512];
const char *s;
int i, is_signed = 0, nbytes;
int digest_algo = 0;
int err;
cdk_error_t rc;
memset(&md, 0, sizeof(md));
if (output)
{
rc = cdk_stream_create (output, &out);
if (rc)
return rc;
}
rc = cdk_stream_open (file, &inp);
if (rc)
{
if (output)
cdk_stream_close (out);
return rc;
}
s = "-----BEGIN PGP SIGNED MESSAGE-----";
while (!cdk_stream_eof (inp))
{
nbytes = _cdk_stream_gets (inp, buf, DIM (buf) - 1);
if (!nbytes || nbytes == -1)
break;
if (!strncmp (buf, s, strlen (s)))
{
is_signed = 1;
break;
}
}
if (cdk_stream_eof (inp) && !is_signed)
{
rc = CDK_Armor_Error;
goto leave;
}
while (!cdk_stream_eof (inp))
{
nbytes = _cdk_stream_gets (inp, buf, DIM (buf) - 1);
if (!nbytes || nbytes == -1)
break;
if (nbytes == 1) /* Empty line */
break;
else if (!strncmp (buf, "Hash: ", 6))
{
for (i = 0; digest_table[i].name; i++)
{
if (!strcmp (buf + 6, digest_table[i].name))
{
digest_algo = digest_table[i].algo;
break;
}
}
}
}
if (digest_algo && _gnutls_hash_get_algo_len (digest_algo) <= 0)
{
rc = CDK_Inv_Algo;
goto leave;
}
if (!digest_algo)
digest_algo = GNUTLS_DIG_MD5;
err = _gnutls_hash_init (&md, digest_algo);
if (err < 0)
{
rc = map_gnutls_error (err);
goto leave;
}
s = "-----BEGIN PGP SIGNATURE-----";
while (!cdk_stream_eof (inp))
{
nbytes = _cdk_stream_gets (inp, buf, DIM (buf) - 1);
if (!nbytes || nbytes == -1)
break;
if (!strncmp (buf, s, strlen (s)))
break;
else
{
cdk_stream_peek (inp, (byte *) chk, DIM (chk) - 1);
i = strncmp (chk, s, strlen (s));
if (strlen (buf) == 0 && i == 0)
continue; /* skip last '\n' */
_cdk_trim_string (buf, i == 0 ? 0 : 1);
_gnutls_hash (&md, buf, strlen (buf));
}
if (!strncmp (buf, "- ", 2)) /* FIXME: handle it recursive. */
memmove (buf, buf + 2, nbytes - 2);
if (out)
{
if (strstr (buf, "\r\n"))
buf[strlen (buf) - 2] = '\0';
cdk_stream_write (out, buf, strlen (buf));
_cdk_stream_puts (out, _cdk_armor_get_lineend ());
}
}
/* We create a temporary stream object to store the
signature data in there. */
rc = cdk_stream_tmp_new (&tmp);
if (rc)
goto leave;
s = "-----BEGIN PGP SIGNATURE-----\n";
_cdk_stream_puts (tmp, s);
while (!cdk_stream_eof (inp))
{
nbytes = _cdk_stream_gets (inp, buf, DIM (buf) - 1);
if (!nbytes || nbytes == -1)
break;
if (nbytes < (int) (DIM (buf) - 3))
{
buf[nbytes - 1] = '\n';
buf[nbytes] = '\0';
}
cdk_stream_write (tmp, buf, nbytes);
}
/* FIXME: This code is not very elegant. */
cdk_stream_tmp_set_mode (tmp, STREAMCTL_READ);
cdk_stream_seek (tmp, 0);
cdk_stream_set_armor_flag (tmp, 0);
cdk_stream_read (tmp, NULL, 0);
/* the digest handle will be closed there. */
rc = _cdk_proc_packets (hd, tmp, NULL, NULL, NULL, &md);
leave:
_gnutls_hash_deinit (&md, NULL);
cdk_stream_close (out);
cdk_stream_close (tmp);
cdk_stream_close (inp);
return rc;
}