-#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(void *key, int keylen, void *iv,
+ void *pt, void *ct, 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(void *key, int keylen, void *iv,
+ void *ct, void *pt, 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(void *pt, 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(void *key, int keylen, void *pt, 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(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,
};