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/* 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 */
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