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/*
* Copyright (c) 2015, 2025, Oracle and/or its affiliates.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2.0,
* as published by the Free Software Foundation.
*
* This program is designed to work with certain software (including
* but not limited to OpenSSL) that is licensed under separate terms,
* as designated in a particular file or component or in included license
* documentation. The authors of MySQL hereby grant you an additional
* permission to link the program and your derivative works with the
* separately licensed software that they have either included with
* the program or referenced in the documentation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License, version 2.0, for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "plugin/x/client/authentication/mysql41_hash.h"
#include <openssl/sha.h>
#if OPENSSL_VERSION_NUMBER >= 0x30000000L
#include <openssl/evp.h>
#endif /* OPENSSL_VERSION_NUMBER < 0x30000000L */
#if OPENSSL_VERSION_NUMBER < 0x30000000L
int mysql_mysql41_hash_reset(SHA_CTX *context) { return SHA1_Init(context); }
int mysql_mysql41_hash_input(SHA_CTX *context, const uint8_t *message_array,
unsigned length) {
return SHA1_Update(context, message_array, length);
}
int mysql_mysql41_hash_result(SHA_CTX *context,
uint8_t Message_Digest[MYSQL41_HASH_SIZE]) {
return SHA1_Final(Message_Digest, context);
}
#endif /* OPENSSL_VERSION_NUMBER < 0x30000000L */
/**
Wrapper function to compute mysql41_hash message digest.
@param[out] digest Computed mysql41_hash digest
@param[in] buf Message to be computed
@param[in] len Length of the message
*/
void compute_mysql41_hash(uint8_t *digest, const char *buf, unsigned len) {
#if OPENSSL_VERSION_NUMBER >= 0x30000000L
/*
EVP_Digest() is a wrapper around the EVP_DigestInit_ex(),
EVP_Update() and EVP_Final_ex() functions.
*/
EVP_Digest(buf, len, digest, nullptr, EVP_sha1(), nullptr);
#else /* OPENSSL_VERSION_NUMBER >= 0x30000000L */
SHA_CTX mysql41_hash_context;
mysql_mysql41_hash_reset(&mysql41_hash_context);
mysql_mysql41_hash_input(&mysql41_hash_context, (const uint8_t *)buf, len);
mysql_mysql41_hash_result(&mysql41_hash_context, digest);
#endif /* OPENSSL_VERSION_NUMBER >= 0x30000000L */
}
/**
Wrapper function to compute mysql41_hash message digest for
two messages in order to emulate mysql41_hash(msg1, msg2).
@param[out] digest Computed mysql41_hash digest
@param[in] buf1 First message
@param[in] len1 Length of first message
@param[in] buf2 Second message
@param[in] len2 Length of second message
*/
void compute_mysql41_hash_multi(uint8_t *digest, const char *buf1,
unsigned len1, const char *buf2,
unsigned len2) {
#if OPENSSL_VERSION_NUMBER >= 0x30000000L
EVP_MD_CTX *md_ctx = EVP_MD_CTX_new();
EVP_DigestInit_ex(md_ctx, EVP_sha1(), nullptr);
EVP_DigestUpdate(md_ctx, buf1, len1);
EVP_DigestUpdate(md_ctx, buf2, len2);
EVP_DigestFinal_ex(md_ctx, digest, nullptr);
EVP_MD_CTX_free(md_ctx);
#else /* OPENSSL_VERSION_NUMBER >= 0x30000000L */
SHA_CTX mysql41_hash_context;
mysql_mysql41_hash_reset(&mysql41_hash_context);
mysql_mysql41_hash_input(&mysql41_hash_context, (const uint8_t *)buf1, len1);
mysql_mysql41_hash_input(&mysql41_hash_context, (const uint8_t *)buf2, len2);
mysql_mysql41_hash_result(&mysql41_hash_context, digest);
#endif /* OPENSSL_VERSION_NUMBER >= 0x30000000L */
}
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