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| author | Nikita Popov <nikita.ppv@gmail.com> | 2020-02-18 16:17:34 +0100 |
|---|---|---|
| committer | Nikita Popov <nikita.ppv@gmail.com> | 2020-02-18 16:17:56 +0100 |
| commit | 9d31a42a30e944688c29aefc4bd0396ce395efe1 (patch) | |
| tree | 68ade61e318dbdb264ac65189b02e9b1abfe59c5 /ext/mysqlnd/mysqlnd_auth.c | |
| parent | f6fcc5c3535c280b76fd8a533bc5eb3f489e9107 (diff) | |
| download | php-git-9d31a42a30e944688c29aefc4bd0396ce395efe1.tar.gz | |
Don't use VLA in mysqlnd auth
We use alloca instead of VLA. This should also allow building
this code on Windows.
Diffstat (limited to 'ext/mysqlnd/mysqlnd_auth.c')
| -rw-r--r-- | ext/mysqlnd/mysqlnd_auth.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/ext/mysqlnd/mysqlnd_auth.c b/ext/mysqlnd/mysqlnd_auth.c index 24c77220fc..14a65eed0d 100644 --- a/ext/mysqlnd/mysqlnd_auth.c +++ b/ext/mysqlnd/mysqlnd_auth.c @@ -806,7 +806,8 @@ mysqlnd_sha256_auth_get_auth_data(struct st_mysqlnd_authentication_plugin * self if (server_public_key) { int server_public_key_len; - char xor_str[passwd_len + 1]; + ALLOCA_FLAG(use_heap); + char *xor_str = do_alloca(passwd_len + 1, use_heap); memcpy(xor_str, passwd, passwd_len); xor_str[passwd_len] = '\0'; mysqlnd_xor_string(xor_str, passwd_len, (char *) auth_plugin_data, auth_plugin_data_len); @@ -819,6 +820,7 @@ mysqlnd_sha256_auth_get_auth_data(struct st_mysqlnd_authentication_plugin * self */ 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); @@ -828,6 +830,7 @@ mysqlnd_sha256_auth_get_auth_data(struct st_mysqlnd_authentication_plugin * self 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); } } @@ -1025,7 +1028,8 @@ mysqlnd_caching_sha2_get_and_use_key(MYSQLND_CONN_DATA *conn, if (server_public_key) { int server_public_key_len; - char xor_str[passwd_len + 1]; + ALLOCA_FLAG(use_heap) + char *xor_str = do_alloca(passwd_len + 1, use_heap); memcpy(xor_str, passwd, passwd_len); xor_str[passwd_len] = '\0'; mysqlnd_xor_string(xor_str, passwd_len, (char *) auth_plugin_data, SCRAMBLE_LENGTH); @@ -1038,6 +1042,7 @@ mysqlnd_caching_sha2_get_and_use_key(MYSQLND_CONN_DATA *conn, */ 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); @@ -1045,6 +1050,7 @@ mysqlnd_caching_sha2_get_and_use_key(MYSQLND_CONN_DATA *conn, *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); DBG_RETURN(server_public_key_len); } DBG_RETURN(0); |