X-Git-Url: http://www.average.org/gitweb/?p=pam_pcsc_cr.git;a=blobdiff_plain;f=crypto.c;h=cb996e870f71cf011bd41b4b159528bb5f35f825;hp=cbdae18f8d32ca2349a050a199ecb25b28e9678d;hb=c498f013eeb5a5decd93e5830fa61929e4c650cc;hpb=4f3247d992b2d4152da0ebc0daf828c874e0b1f1

diff --git a/crypto.c b/crypto.c
index cbdae18..cb996e8 100644
--- a/crypto.c
+++ b/crypto.c
@@ -1,30 +1,97 @@
-#include <openssl/evp.h>
-#include <openssl/hmac.h>
+/*
+Copyright (c) 2013 Eugene Crosser
 
-int main()
+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 <assert.h>
+#include "crypto.h"
+#include "crypto_if.h"
+
+extern struct crypto_interface ossl_crypto_if;
+extern struct crypto_interface tom_crypto_if;
+extern struct crypto_interface gnu_crypto_if;
+
+static struct crypto_interface *ifs[] = {
+#ifdef HAVE_OPENSSL
+	&ossl_crypto_if,
+#endif
+#ifdef HAVE_TOMCRYPT
+	&tom_crypto_if,
+#endif
+#ifdef HAVE_GCRYPT
+	&gnu_crypto_if,
+#endif
+	(struct crypto_interface *)0,
+};
+#define MAX_IF (sizeof(ifs)/sizeof(struct crypto_interface *)-2)
+
+static int which = 0;
+
+int select_crypto_if(const int ifno)
 {
-    EVP_CIPHER_CTX ctx;
-    unsigned char key[32] = {0};
-    unsigned char iv[16] = {0};
-    unsigned char in[16] = {0};
-    unsigned char out[32]; /* at least one block longer than in[] */
-    int outlen1, outlen2;
+	if (ifno < 0 || ifno > MAX_IF) return -1;
+	which = ifno;
+	return 0;
+}
 
-    EVP_EncryptInit(&ctx, EVP_aes_256_cbc(), key, iv);
-    EVP_EncryptUpdate(&ctx, out, &outlen1, in, sizeof(in));
-    EVP_EncryptFinal(&ctx, out + outlen1, &outlen2);
+const char *crypto_init(const int ifno)
+{
+	if (ifno < 0 || ifno > MAX_IF) return (const char *)0;
+	return ifs[ifno]->init();
+}
 
-    printf("ciphertext length: %d\n", outlen1 + outlen2);
+#define INITIV {0}
 
-    return 0;
+unsigned long encrypt(const void *key, const int keylen, const void *pt, void *ct, const int tlen)
+{
+	unsigned char iv[16] = INITIV;
+
+	assert(keylen == 16);
+	return ifs[which]->encrypt(key, keylen, iv, pt, ct, tlen);
+}
+
+unsigned long decrypt(const void *key, const int keylen, const void *ct, void *pt, const int tlen)
+{
+	unsigned char iv[16] = INITIV;
+
+	assert(keylen == 16);
+	return ifs[which]->decrypt(key, keylen, iv, ct, pt, tlen);
+}
+
+unsigned long hash(const void *pt, const int tlen, void *tag, int *taglen)
+{
+	assert(*taglen == 20);
+	return ifs[which]->hash(pt, tlen, tag, taglen);
 }
 
-// result = HMAC(EVP_sha256(), key, 999, data, 888, NULL, NULL);
-//               EVP_MD *
+unsigned long hmac(const void *key, const int keylen, const void *pt, const int tlen, void *tag, int *taglen)
+{
+	assert(*taglen == 20);
+	return ifs[which]->hmac(key, keylen, pt, tlen, tag, taglen);
+}
 
-// 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);
+const char *crypto_errstr(const unsigned long err)
+{
+	return ifs[which]->errstr(err);
+}