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Abstract over crypto operations

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This commit is contained in:
Christoph M. Becker 2020-02-26 16:56:57 +01:00
parent 7fa6e2a25c
commit a7400d5fd3
1 changed files with 77 additions and 61 deletions
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138
ext/mysqlnd/mysqlnd_auth.c
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@ -699,15 +699,55 @@ mysqlnd_xor_string(char * dst, const size_t dst_len, const char * xor_str, const
#include <openssl/pem.h> #include <openssl/pem.h>
#include <openssl/err.h> #include <openssl/err.h>
typedef RSA * mysqlnd_rsa_t;
/* {{{ mysqlnd_sha256_get_rsa_from_pem */
static mysqlnd_rsa_t
mysqlnd_sha256_get_rsa_from_pem(const char *buf, size_t len)
{
BIO * bio = BIO_new_mem_buf(buf, len);
RSA * ret = PEM_read_bio_RSA_PUBKEY(bio, NULL, NULL, NULL);
BIO_free(bio);
return ret;
}
/* }}} */
/* {{{ mysqlnd_sha256_public_encrypt */
static zend_uchar *
mysqlnd_sha256_public_encrypt(MYSQLND_CONN_DATA * conn, mysqlnd_rsa_t server_public_key, size_t passwd_len, size_t * auth_data_len, char *xor_str)
{
zend_uchar * ret = NULL;
size_t server_public_key_len = (size_t) RSA_size(server_public_key);
DBG_ENTER("mysqlnd_sha256_public_encrypt");
/*
Because RSA_PKCS1_OAEP_PADDING is used there is a restriction on the passwd_len.
RSA_PKCS1_OAEP_PADDING is recommended for new applications. See more here:
http://www.openssl.org/docs/crypto/RSA_public_encrypt.html
*/
if (server_public_key_len <= passwd_len + 41) {
/* password message is to long */
SET_CLIENT_ERROR(conn->error_info, CR_UNKNOWN_ERROR, UNKNOWN_SQLSTATE, "password is too long");
DBG_ERR("password is too long");
DBG_RETURN(NULL);
}
*auth_data_len = server_public_key_len;
ret = malloc(*auth_data_len);
RSA_public_encrypt(passwd_len + 1, (zend_uchar *) xor_str, ret, server_public_key, RSA_PKCS1_OAEP_PADDING);
RSA_free(server_public_key);
DBG_RETURN(ret);
}
/* }}} */
/* {{{ mysqlnd_sha256_get_rsa_key */ /* {{{ mysqlnd_sha256_get_rsa_key */
static RSA * static mysqlnd_rsa_t
mysqlnd_sha256_get_rsa_key(MYSQLND_CONN_DATA * conn, mysqlnd_sha256_get_rsa_key(MYSQLND_CONN_DATA * conn,
const MYSQLND_SESSION_OPTIONS * const session_options, const MYSQLND_SESSION_OPTIONS * const session_options,
const MYSQLND_PFC_DATA * const pfc_data const MYSQLND_PFC_DATA * const pfc_data
) )
{ {
RSA * ret = NULL; mysqlnd_rsa_t ret = NULL;
const char * fname = (pfc_data->sha256_server_public_key && pfc_data->sha256_server_public_key[0] != '\0')? const char * fname = (pfc_data->sha256_server_public_key && pfc_data->sha256_server_public_key[0] != '\0')?
pfc_data->sha256_server_public_key: pfc_data->sha256_server_public_key:
MYSQLND_G(sha256_server_public_key); MYSQLND_G(sha256_server_public_key);
@ -739,11 +779,7 @@ mysqlnd_sha256_get_rsa_key(MYSQLND_CONN_DATA * conn,
} }
DBG_INF_FMT("Public key(%d):\n%s", pk_resp_packet.public_key_len, pk_resp_packet.public_key); DBG_INF_FMT("Public key(%d):\n%s", pk_resp_packet.public_key_len, pk_resp_packet.public_key);
/* now extract the public key */ /* now extract the public key */
{ ret = mysqlnd_sha256_get_rsa_from_pem((const char *) pk_resp_packet.public_key, pk_resp_packet.public_key_len);
BIO * bio = BIO_new_mem_buf(pk_resp_packet.public_key, pk_resp_packet.public_key_len);
ret = PEM_read_bio_RSA_PUBKEY(bio, NULL, NULL, NULL);
BIO_free(bio);
}
} while (0); } while (0);
PACKET_FREE(&pk_req_packet); PACKET_FREE(&pk_req_packet);
PACKET_FREE(&pk_resp_packet); PACKET_FREE(&pk_resp_packet);
@ -762,9 +798,7 @@ mysqlnd_sha256_get_rsa_key(MYSQLND_CONN_DATA * conn,
if (stream) { if (stream) {
if ((key_str = php_stream_copy_to_mem(stream, PHP_STREAM_COPY_ALL, 0)) != NULL) { if ((key_str = php_stream_copy_to_mem(stream, PHP_STREAM_COPY_ALL, 0)) != NULL) {
BIO * bio = BIO_new_mem_buf(ZSTR_VAL(key_str), ZSTR_LEN(key_str)); ret = mysqlnd_sha256_get_rsa_from_pem(ZSTR_VAL(key_str), ZSTR_LEN(key_str));
ret = PEM_read_bio_RSA_PUBKEY(bio, NULL, NULL, NULL);
BIO_free(bio);
DBG_INF("Successfully loaded"); DBG_INF("Successfully loaded");
DBG_INF_FMT("Public key:%*.s", ZSTR_LEN(key_str), ZSTR_VAL(key_str)); DBG_INF_FMT("Public key:%*.s", ZSTR_LEN(key_str), ZSTR_VAL(key_str));
zend_string_release_ex(key_str, 0); zend_string_release_ex(key_str, 0);
@ -788,7 +822,7 @@ mysqlnd_sha256_auth_get_auth_data(struct st_mysqlnd_authentication_plugin * self
const zend_ulong mysql_flags const zend_ulong mysql_flags
) )
{ {
RSA * server_public_key; mysqlnd_rsa_t server_public_key;
zend_uchar * ret = NULL; zend_uchar * ret = NULL;
DBG_ENTER("mysqlnd_sha256_auth_get_auth_data"); DBG_ENTER("mysqlnd_sha256_auth_get_auth_data");
DBG_INF_FMT("salt(%d)=[%.*s]", auth_plugin_data_len, auth_plugin_data_len, auth_plugin_data); DBG_INF_FMT("salt(%d)=[%.*s]", auth_plugin_data_len, auth_plugin_data_len, auth_plugin_data);
@ -805,31 +839,12 @@ mysqlnd_sha256_auth_get_auth_data(struct st_mysqlnd_authentication_plugin * self
server_public_key = mysqlnd_sha256_get_rsa_key(conn, session_options, pfc_data); server_public_key = mysqlnd_sha256_get_rsa_key(conn, session_options, pfc_data);
if (server_public_key) { if (server_public_key) {
int server_public_key_len;
ALLOCA_FLAG(use_heap); ALLOCA_FLAG(use_heap);
char *xor_str = do_alloca(passwd_len + 1, use_heap); char *xor_str = do_alloca(passwd_len + 1, use_heap);
memcpy(xor_str, passwd, passwd_len); memcpy(xor_str, passwd, passwd_len);
xor_str[passwd_len] = '\0'; xor_str[passwd_len] = '\0';
mysqlnd_xor_string(xor_str, passwd_len, (char *) auth_plugin_data, auth_plugin_data_len); mysqlnd_xor_string(xor_str, passwd_len, (char *) auth_plugin_data, auth_plugin_data_len);
ret = mysqlnd_sha256_public_encrypt(conn, server_public_key, passwd_len, auth_data_len, xor_str);
server_public_key_len = RSA_size(server_public_key);
/*
Because RSA_PKCS1_OAEP_PADDING is used there is a restriction on the passwd_len.
RSA_PKCS1_OAEP_PADDING is recommended for new applications. See more here:
http://www.openssl.org/docs/crypto/RSA_public_encrypt.html
*/
if ((size_t) server_public_key_len - 41 <= passwd_len) {
/* password message is to long */
free_alloca(xor_str, use_heap);
SET_CLIENT_ERROR(conn->error_info, CR_UNKNOWN_ERROR, UNKNOWN_SQLSTATE, "password is too long");
DBG_ERR("password is too long");
DBG_RETURN(NULL);
}
*auth_data_len = server_public_key_len;
ret = malloc(*auth_data_len);
RSA_public_encrypt(passwd_len + 1, (zend_uchar *) xor_str, ret, server_public_key, RSA_PKCS1_OAEP_PADDING);
RSA_free(server_public_key);
free_alloca(xor_str, use_heap); free_alloca(xor_str, use_heap);
} }
} }
@ -901,6 +916,30 @@ void php_mysqlnd_scramble_sha2(zend_uchar * const buffer, const zend_uchar * con
} }
/* }}} */ /* }}} */
/* {{{ mysqlnd_caching_sha2_public_encrypt */
static size_t
mysqlnd_caching_sha2_public_encrypt(MYSQLND_CONN_DATA * conn, mysqlnd_rsa_t server_public_key, size_t passwd_len, unsigned char **crypted, char *xor_str)
{
size_t server_public_key_len = (size_t) RSA_size(server_public_key);
DBG_ENTER("mysqlnd_caching_sha2_public_encrypt");
/*
Because RSA_PKCS1_OAEP_PADDING is used there is a restriction on the passwd_len.
RSA_PKCS1_OAEP_PADDING is recommended for new applications. See more here:
http://www.openssl.org/docs/crypto/RSA_public_encrypt.html
*/
if (server_public_key_len <= passwd_len + 41) {
/* password message is to long */
SET_CLIENT_ERROR(conn->error_info, CR_UNKNOWN_ERROR, UNKNOWN_SQLSTATE, "password is too long");
DBG_ERR("password is too long");
DBG_RETURN(0);
}
*crypted = emalloc(server_public_key_len);
RSA_public_encrypt(passwd_len + 1, (zend_uchar *) xor_str, *crypted, server_public_key, RSA_PKCS1_OAEP_PADDING);
DBG_RETURN(server_public_key_len);
}
/* }}} */
/* {{{ mysqlnd_native_auth_get_auth_data */ /* {{{ mysqlnd_native_auth_get_auth_data */
static zend_uchar * static zend_uchar *
@ -938,10 +977,10 @@ mysqlnd_caching_sha2_get_auth_data(struct st_mysqlnd_authentication_plugin * sel
} }
/* }}} */ /* }}} */
static RSA * static mysqlnd_rsa_t
mysqlnd_caching_sha2_get_key(MYSQLND_CONN_DATA *conn) mysqlnd_caching_sha2_get_key(MYSQLND_CONN_DATA *conn)
{ {
RSA * ret = NULL; mysqlnd_rsa_t ret = NULL;
const MYSQLND_PFC_DATA * const pfc_data = conn->protocol_frame_codec->data; const MYSQLND_PFC_DATA * const pfc_data = conn->protocol_frame_codec->data;
const char * fname = (pfc_data->sha256_server_public_key && pfc_data->sha256_server_public_key[0] != '\0')? const char * fname = (pfc_data->sha256_server_public_key && pfc_data->sha256_server_public_key[0] != '\0')?
pfc_data->sha256_server_public_key: pfc_data->sha256_server_public_key:
@ -975,11 +1014,7 @@ mysqlnd_caching_sha2_get_key(MYSQLND_CONN_DATA *conn)
} }
DBG_INF_FMT("Public key(%d):\n%s", pk_resp_packet.public_key_len, pk_resp_packet.public_key); DBG_INF_FMT("Public key(%d):\n%s", pk_resp_packet.public_key_len, pk_resp_packet.public_key);
/* now extract the public key */ /* now extract the public key */
{ ret = mysqlnd_sha256_get_rsa_from_pem((const char *) pk_resp_packet.public_key, pk_resp_packet.public_key_len);
BIO * bio = BIO_new_mem_buf(pk_resp_packet.public_key, pk_resp_packet.public_key_len);
ret = PEM_read_bio_RSA_PUBKEY(bio, NULL, NULL, NULL);
BIO_free(bio);
}
} while (0); } while (0);
PACKET_FREE(&req_packet); PACKET_FREE(&req_packet);
PACKET_FREE(&pk_resp_packet); PACKET_FREE(&pk_resp_packet);
@ -998,9 +1033,7 @@ mysqlnd_caching_sha2_get_key(MYSQLND_CONN_DATA *conn)
if (stream) { if (stream) {
if ((key_str = php_stream_copy_to_mem(stream, PHP_STREAM_COPY_ALL, 0)) != NULL) { if ((key_str = php_stream_copy_to_mem(stream, PHP_STREAM_COPY_ALL, 0)) != NULL) {
BIO * bio = BIO_new_mem_buf(ZSTR_VAL(key_str), ZSTR_LEN(key_str)); ret = mysqlnd_sha256_get_rsa_from_pem(ZSTR_VAL(key_str), ZSTR_LEN(key_str));
ret = PEM_read_bio_RSA_PUBKEY(bio, NULL, NULL, NULL);
BIO_free(bio);
DBG_INF("Successfully loaded"); DBG_INF("Successfully loaded");
DBG_INF_FMT("Public key:%*.s", ZSTR_LEN(key_str), ZSTR_VAL(key_str)); DBG_INF_FMT("Public key:%*.s", ZSTR_LEN(key_str), ZSTR_VAL(key_str));
zend_string_release(key_str); zend_string_release(key_str);
@ -1013,7 +1046,7 @@ mysqlnd_caching_sha2_get_key(MYSQLND_CONN_DATA *conn)
} }
/* {{{ mysqlnd_caching_sha2_get_key */ /* {{{ mysqlnd_caching_sha2_get_and_use_key */
static size_t static size_t
mysqlnd_caching_sha2_get_and_use_key(MYSQLND_CONN_DATA *conn, mysqlnd_caching_sha2_get_and_use_key(MYSQLND_CONN_DATA *conn,
const zend_uchar * auth_plugin_data, const size_t auth_plugin_data_len, const zend_uchar * auth_plugin_data, const size_t auth_plugin_data_len,
@ -1021,8 +1054,7 @@ mysqlnd_caching_sha2_get_and_use_key(MYSQLND_CONN_DATA *conn,
const char * const passwd, const char * const passwd,
const size_t passwd_len) const size_t passwd_len)
{ {
static RSA *server_public_key; mysqlnd_rsa_t server_public_key = mysqlnd_caching_sha2_get_key(conn);
server_public_key = mysqlnd_caching_sha2_get_key(conn);
DBG_ENTER("mysqlnd_caching_sha2_get_and_use_key("); DBG_ENTER("mysqlnd_caching_sha2_get_and_use_key(");
@ -1033,23 +1065,7 @@ mysqlnd_caching_sha2_get_and_use_key(MYSQLND_CONN_DATA *conn,
memcpy(xor_str, passwd, passwd_len); memcpy(xor_str, passwd, passwd_len);
xor_str[passwd_len] = '\0'; xor_str[passwd_len] = '\0';
mysqlnd_xor_string(xor_str, passwd_len, (char *) auth_plugin_data, SCRAMBLE_LENGTH); mysqlnd_xor_string(xor_str, passwd_len, (char *) auth_plugin_data, SCRAMBLE_LENGTH);
server_public_key_len = mysqlnd_caching_sha2_public_encrypt(conn, server_public_key, passwd_len, crypted, xor_str);
server_public_key_len = RSA_size(server_public_key);
/*
Because RSA_PKCS1_OAEP_PADDING is used there is a restriction on the passwd_len.
RSA_PKCS1_OAEP_PADDING is recommended for new applications. See more here:
http://www.openssl.org/docs/crypto/RSA_public_encrypt.html
*/
if ((size_t) server_public_key_len - 41 <= passwd_len) {
/* password message is to long */
free_alloca(xor_str, use_heap);
SET_CLIENT_ERROR(conn->error_info, CR_UNKNOWN_ERROR, UNKNOWN_SQLSTATE, "password is too long");
DBG_ERR("password is too long");
DBG_RETURN(0);
}
*crypted = emalloc(server_public_key_len);
RSA_public_encrypt(passwd_len + 1, (zend_uchar *) xor_str, *crypted, server_public_key, RSA_PKCS1_OAEP_PADDING);
free_alloca(xor_str, use_heap); free_alloca(xor_str, use_heap);
DBG_RETURN(server_public_key_len); DBG_RETURN(server_public_key_len);
} }