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[pam_pcsc_cr.git] / ossl_crypto.c

diff --git a/ossl_crypto.c b/ossl_crypto.c
index 61c6504cf0e0688c3193793dc28f50f5797cad3f..e0e10bce4e3a7b59a98a4819a383d4cc2489b640 100644 (file)
--- a/ossl_crypto.c
+++ b/ossl_crypto.c
@@ -1,53 +1,108 @@
-#include <openssl/evp.h>
+/*
+Copyright (c) 2013 Eugene Crosser
+
+This software is provided 'as-is', without any express or implied
+warranty. In no event will the authors be held liable for any damages
+arising from the use of this software.
+
+Permission is granted to anyone to use this software for any purpose,
+including commercial applications, and to alter it and redistribute it
+freely, subject to the following restrictions:
+
+    1. The origin of this software must not be misrepresented; you must
+    not claim that you wrote the original software. If you use this
+    software in a product, an acknowledgment in the product documentation
+    would be appreciated but is not required.
+
+    2. Altered source versions must be plainly marked as such, and must
+    not be misrepresented as being the original software.
+
+    3. This notice may not be removed or altered from any source
+    distribution.
+*/
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+#include <openssl/err.h>
+#include <openssl/aes.h>
+#include <openssl/sha.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)
+static const char *ossl_init(void)
 {
-    EVP_CIPHER_CTX ctx;
-    unsigned char iv[16] = {0};
-    int outlen1, outlen2;
+       ERR_load_crypto_strings();
+       return "openssl";
+}
 
-    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;
+static unsigned long ossl_encrypt(const void *key, const int keylen, void *iv,
+                       const void *pt, void *ct, const int tlen)
+{
+       AES_KEY akey;
 
-    return 0;
+       if (AES_set_encrypt_key(key, keylen*8, &akey))
+               return ERR_get_error();
+       AES_cbc_encrypt(pt, ct, tlen, &akey, iv, AES_ENCRYPT);
+       return 0UL;
 }
 
-static int ossl_decrypt()
+static unsigned long ossl_decrypt(const void *key, const int keylen, void *iv,
+                       const void *ct, void *pt, const int tlen)
 {
-       return 0;
+       AES_KEY akey;
+
+       if (AES_set_decrypt_key(key, keylen*8, &akey))
+               return ERR_get_error();
+       AES_cbc_encrypt(ct, pt, tlen, &akey, iv, AES_DECRYPT);
+       return 0UL;
 }
 
-static int ossl_hash()
+static unsigned long ossl_hash(const void *pt, const int tlen,
+                       void *tag, int *taglen)
 {
-       return 0;
+       SHA_CTX sctx;
+
+       if (!SHA1_Init(&sctx)) return ERR_get_error();
+       if (!SHA1_Update(&sctx, pt, tlen)) return ERR_get_error();
+       if (!SHA1_Final(tag, &sctx)) return ERR_get_error();
+       *taglen = SHA_DIGEST_LENGTH;
+       return 0UL;
 }
 
-static int ossl_hmac()
+static unsigned long ossl_hmac(const void *key, int const keylen,
+                       const void *pt, const int tlen,
+                       void *tag, int *taglen)
 {
-       return 0;
-}
+#if 1
+       HMAC_CTX hctx;
 
-// result = HMAC(EVP_sha256(), key, 999, data, 888, NULL, NULL);
-//               EVP_MD *
+       HMAC_CTX_init(&hctx);
+       if (!HMAC_Init_ex(&hctx, key, keylen, EVP_sha1(), NULL))
+               return ERR_get_error();
+       if (!HMAC_Update(&hctx, pt, tlen)) return ERR_get_error();
+       if (!HMAC_Final(&hctx, tag, (unsigned int *)taglen))
+               return ERR_get_error();
+       HMAC_CTX_cleanup(&hctx);
+#else
+       if (HMAC(EVP_sha1(), key, keylen, pt, tlen,
+                               tag, (unsigned int *)taglen) != tag)
+               return ERR_get_error();
+#endif
+       return 0UL;
+}
 
-// 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);
+static const char *ossl_errstr(const unsigned long err)
+{
+       return ERR_error_string(err, NULL);
+}
 
 struct crypto_interface ossl_crypto_if = {
-       .name           = "openssl",
+       .init           = ossl_init,
        .encrypt        = ossl_encrypt,
        .decrypt        = ossl_decrypt,
        .hash           = ossl_hash,
        .hmac           = ossl_hmac,
+       .errstr         = ossl_errstr,
 };