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-rw-r--r--src/libcrypto.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/src/libcrypto.c b/src/libcrypto.c
index 747994ef..79775417 100644
--- a/src/libcrypto.c
+++ b/src/libcrypto.c
@@ -97,6 +97,34 @@ void sha1(unsigned char *digest, int len, unsigned char *hash) {
SHA1(digest, len, hash);
}
+#ifdef HAVE_OPENSSL_ECC
+static const EVP_MD *nid_to_evpmd(int nid)
+{
+ switch (nid) {
+ case NID_X9_62_prime256v1:
+ return EVP_sha256();
+ case NID_secp384r1:
+ return EVP_sha384();
+ case NID_secp521r1:
+ return EVP_sha512();
+ default:
+ return NULL;
+ }
+
+ return NULL;
+}
+
+void evp(int nid, unsigned char *digest, int len, unsigned char *hash, unsigned int *hlen)
+{
+ const EVP_MD *evp_md = nid_to_evpmd(nid);
+ EVP_MD_CTX md;
+
+ EVP_DigestInit(&md, evp_md);
+ EVP_DigestUpdate(&md, digest, len);
+ EVP_DigestFinal(&md, hash, hlen);
+}
+#endif
+
SHA256CTX sha256_init(void){
SHA256CTX c = malloc(sizeof(*c));
if (c == NULL) {