diff options
Diffstat (limited to 'cryptography/hazmat/bindings/openssl/hmac.py')
| -rw-r--r-- | cryptography/hazmat/bindings/openssl/hmac.py | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/cryptography/hazmat/bindings/openssl/hmac.py b/cryptography/hazmat/bindings/openssl/hmac.py index 8202f80c..10e67141 100644 --- a/cryptography/hazmat/bindings/openssl/hmac.py +++ b/cryptography/hazmat/bindings/openssl/hmac.py @@ -27,7 +27,7 @@ int Cryptography_HMAC_Init_ex(HMAC_CTX *, const void *, int, const EVP_MD *, ENGINE *); int Cryptography_HMAC_Update(HMAC_CTX *, const unsigned char *, size_t); int Cryptography_HMAC_Final(HMAC_CTX *, unsigned char *, unsigned int *); -int HMAC_CTX_copy(HMAC_CTX *, HMAC_CTX *); +int Cryptography_HMAC_CTX_copy(HMAC_CTX *, HMAC_CTX *); """ MACROS = """ @@ -64,4 +64,27 @@ int Cryptography_HMAC_Final(HMAC_CTX *ctx, unsigned char *digest, #endif } +int Cryptography_HMAC_CTX_copy(HMAC_CTX *dst_ctx, HMAC_CTX *src_ctx) { +#if OPENSSL_VERSION_NUMBER >= 0x010000000 + return HMAC_CTX_copy(dst_ctx, src_ctx); +#else + HMAC_CTX_init(dst_ctx); + if (!EVP_MD_CTX_copy_ex(&dst_ctx->i_ctx, &src_ctx->i_ctx)) { + goto err; + } + if (!EVP_MD_CTX_copy_ex(&dst_ctx->o_ctx, &src_ctx->o_ctx)) { + goto err; + } + if (!EVP_MD_CTX_copy_ex(&dst_ctx->md_ctx, &src_ctx->md_ctx)) { + goto err; + } + memcpy(dst_ctx->key, src_ctx->key, HMAC_MAX_MD_CBLOCK); + dst_ctx->key_length = src_ctx->key_length; + dst_ctx->md = src_ctx->md; + return 1; + + err: + return 0; +#endif +} """ |