git/sha256/openssl.h
Eric Wong 3e440ea0ab sha256: avoid functions deprecated in OpenSSL 3+
OpenSSL 3+ deprecates the SHA256_Init, SHA256_Update, and SHA256_Final
functions, leading to errors when building with `DEVELOPER=1'.

Use the newer EVP_* API with OpenSSL 3+ despite being more
error-prone and less efficient due to heap allocations.

Signed-off-by: Eric Wong <e@80x24.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-08-01 08:34:54 -07:00

50 lines
1.2 KiB
C

/* wrappers for the EVP API of OpenSSL 3+ */
#ifndef SHA256_OPENSSL_H
#define SHA256_OPENSSL_H
#include <openssl/evp.h>
struct openssl_SHA256_CTX {
EVP_MD_CTX *ectx;
};
typedef struct openssl_SHA256_CTX openssl_SHA256_CTX;
static inline void openssl_SHA256_Init(struct openssl_SHA256_CTX *ctx)
{
const EVP_MD *type = EVP_sha256();
ctx->ectx = EVP_MD_CTX_new();
if (!ctx->ectx)
die("EVP_MD_CTX_new: out of memory");
EVP_DigestInit_ex(ctx->ectx, type, NULL);
}
static inline void openssl_SHA256_Update(struct openssl_SHA256_CTX *ctx,
const void *data,
size_t len)
{
EVP_DigestUpdate(ctx->ectx, data, len);
}
static inline void openssl_SHA256_Final(unsigned char *digest,
struct openssl_SHA256_CTX *ctx)
{
EVP_DigestFinal_ex(ctx->ectx, digest, NULL);
EVP_MD_CTX_free(ctx->ectx);
}
static inline void openssl_SHA256_Clone(struct openssl_SHA256_CTX *dst,
const struct openssl_SHA256_CTX *src)
{
EVP_MD_CTX_copy_ex(dst->ectx, src->ectx);
}
#define platform_SHA256_CTX openssl_SHA256_CTX
#define platform_SHA256_Init openssl_SHA256_Init
#define platform_SHA256_Clone openssl_SHA256_Clone
#define platform_SHA256_Update openssl_SHA256_Update
#define platform_SHA256_Final openssl_SHA256_Final
#endif /* SHA256_OPENSSL_H */