crypto interface

[pam_pcsc_cr.git] / ossl_crypto.c

diff --git a/ossl_crypto.c b/ossl_crypto.c
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..61c6504cf0e0688c3193793dc28f50f5797cad3f 100644 (file)
--- a/ossl_crypto.c
+++ b/ossl_crypto.c
@@ -0,0 +1,53 @@
+#include <openssl/evp.h>
+#include <openssl/hmac.h>
+
+#include "crypto_if.h"
+
+static int ossl_encrypt(void *pt, int ptlen, void *key, int keylen,
+                       void *ct, int *ctlen)
+{
+    EVP_CIPHER_CTX ctx;
+    unsigned char iv[16] = {0};
+    int outlen1, outlen2;
+
+    EVP_EncryptInit(&ctx, EVP_aes_256_cbc(), key, iv);
+    EVP_EncryptUpdate(&ctx, ct, &outlen1, pt, ptlen);
+    EVP_EncryptFinal(&ctx, ct + outlen1, &outlen2);
+    if (outlen1 + outlen2 > *ctlen) return -1;
+    *ctlen = outlen1 + outlen2;
+
+    return 0;
+}
+
+static int ossl_decrypt()
+{
+       return 0;
+}
+
+static int ossl_hash()
+{
+       return 0;
+}
+
+static int ossl_hmac()
+{
+       return 0;
+}
+
+// result = HMAC(EVP_sha256(), key, 999, data, 888, NULL, NULL);
+//               EVP_MD *
+
+// HMAC_CTX hctx;
+// HMAC_CTX_init(&hctx);
+// if (HMAC_Init(&hctx, key, keylen, EVP_sha1())) success;
+// if (HMAC_Update(&hctx, data, datalen)) success;
+// if (HMAC_Final(&hctx, &digest, &digestlen)) success
+// HMAC_CTX_cleanup(&hctx);
+
+struct crypto_interface ossl_crypto_if = {
+       .name           = "openssl",
+       .encrypt        = ossl_encrypt,
+       .decrypt        = ossl_decrypt,
+       .hash           = ossl_hash,
+       .hmac           = ossl_hmac,
+};