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# This file is dual licensed under the terms of the Apache License, Version
# 2.0, and the BSD License. See the LICENSE file in the root of this repository
# for complete details.
from __future__ import absolute_import, division, print_function
INCLUDES = """
#include <openssl/hmac.h>
"""
TYPES = """
typedef ... HMAC_CTX;
"""
FUNCTIONS = """
int HMAC_Init_ex(HMAC_CTX *, const void *, int, const EVP_MD *, ENGINE *);
int HMAC_Update(HMAC_CTX *, const unsigned char *, size_t);
int HMAC_Final(HMAC_CTX *, unsigned char *, unsigned int *);
int HMAC_CTX_copy(HMAC_CTX *, HMAC_CTX *);
HMAC_CTX *Cryptography_HMAC_CTX_new(void);
void Cryptography_HMAC_CTX_free(HMAC_CTX *ctx);
"""
CUSTOMIZATIONS = """
HMAC_CTX *Cryptography_HMAC_CTX_new(void) {
#if CRYPTOGRAPHY_OPENSSL_110_OR_GREATER
return HMAC_CTX_new();
#else
/* This uses OPENSSL_zalloc in 1.1.0, which is malloc + memset */
HMAC_CTX *ctx = (HMAC_CTX *)OPENSSL_malloc(sizeof(HMAC_CTX));
memset(ctx, 0, sizeof(HMAC_CTX));
return ctx;
#endif
}
void Cryptography_HMAC_CTX_free(HMAC_CTX *ctx) {
#if CRYPTOGRAPHY_OPENSSL_110_OR_GREATER
return HMAC_CTX_free(ctx);
#else
if (ctx != NULL) {
HMAC_CTX_cleanup(ctx);
OPENSSL_free(ctx);
}
#endif
}
"""
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