sha256/openssl.h

   1 /* wrappers for the EVP API of OpenSSL 3+ */
   2 #ifndef SHA256_OPENSSL_H
   3 #define SHA256_OPENSSL_H
   4 #include <openssl/evp.h>
   5
   6 struct openssl_SHA256_CTX {
   7         EVP_MD_CTX *ectx;
   8 };
   9
  10 typedef struct openssl_SHA256_CTX openssl_SHA256_CTX;
  11
  12 static inline void openssl_SHA256_Init(struct openssl_SHA256_CTX *ctx)
  13 {
  14         const EVP_MD *type = EVP_sha256();
  15
  16         ctx->ectx = EVP_MD_CTX_new();
  17         if (!ctx->ectx)
  18                 die("EVP_MD_CTX_new: out of memory");
  19
  20         EVP_DigestInit_ex(ctx->ectx, type, NULL);
  21 }
  22
  23 static inline void openssl_SHA256_Update(struct openssl_SHA256_CTX *ctx,
  24                                         const void *data,
  25                                         size_t len)
  26 {
  27         EVP_DigestUpdate(ctx->ectx, data, len);
  28 }
  29
  30 static inline void openssl_SHA256_Final(unsigned char *digest,
  31                                        struct openssl_SHA256_CTX *ctx)
  32 {
  33         EVP_DigestFinal_ex(ctx->ectx, digest, NULL);
  34         EVP_MD_CTX_free(ctx->ectx);
  35 }
  36
  37 static inline void openssl_SHA256_Clone(struct openssl_SHA256_CTX *dst,
  38                                         const struct openssl_SHA256_CTX *src)
  39 {
  40         EVP_MD_CTX_copy_ex(dst->ectx, src->ectx);
  41 }
  42
  43 #define platform_SHA256_CTX openssl_SHA256_CTX
  44 #define platform_SHA256_Init openssl_SHA256_Init
  45 #define platform_SHA256_Clone openssl_SHA256_Clone
  46 #define platform_SHA256_Update openssl_SHA256_Update
  47 #define platform_SHA256_Final openssl_SHA256_Final
  48
  49 #endif /* SHA256_OPENSSL_H */