X-Git-Url: http://www.average.org/gitweb/?p=pam_pcsc_cr.git;a=blobdiff_plain;f=ossl_crypto.c;h=837fac0e553f5ecaf512711d6a954abacaa2a8d7;hp=e69de29bb2d1d6434b8b29ae775ad8c2e48c5391;hb=7d93eea67d10d01d129f5434ddc8bc4a4f3060d8;hpb=4f3247d992b2d4152da0ebc0daf828c874e0b1f1

diff --git a/ossl_crypto.c b/ossl_crypto.c
index e69de29..837fac0 100644
--- a/ossl_crypto.c
+++ b/ossl_crypto.c
@@ -0,0 +1,106 @@
+/*
+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 const char *ossl_init(void)
+{
+	ERR_load_crypto_strings();
+	return "openssl";
+}
+
+static unsigned long ossl_encrypt(void *key, int keylen, void *iv,
+			void *pt, void *ct, int tlen)
+{
+	AES_KEY akey;
+
+	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 unsigned long ossl_decrypt(void *key, int keylen, void *iv,
+			void *ct, void *pt, int tlen)
+{
+	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 unsigned long ossl_hash(void *pt, int tlen, void *tag, int *taglen)
+{
+	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 unsigned long ossl_hmac(void *key, int keylen, void *pt, int tlen,
+			void *tag, int *taglen)
+{
+#if 1
+	HMAC_CTX hctx;
+
+	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;
+}
+
+static const char *ossl_errstr(unsigned long err)
+{
+	return ERR_error_string(err, NULL);
+}
+
+struct crypto_interface ossl_crypto_if = {
+	.init		= ossl_init,
+	.encrypt	= ossl_encrypt,
+	.decrypt	= ossl_decrypt,
+	.hash		= ossl_hash,
+	.hmac		= ossl_hmac,
+	.errstr		= ossl_errstr,
+};