+/*
+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 <stddef.h>
+#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 (int)(sizeof(ifs)/sizeof(struct crypto_interface *)-2)
+
+static int which = 0;
+
+int select_crypto_if(const int ifno)
+{
+ if (ifno < 0 || ifno > MAX_IF) return -1;
+ which = ifno;
+ return 0;
+}
+
+const char *crypto_init(const int ifno)
+{
+ if (ifno < 0 || ifno > MAX_IF) return (const char *)0;
+ return ifs[ifno]->init();
+}
-static struct crypto_interface *active = &ossl_crypto_if;
+#define INITIV {0}
-int encrypt(void *pt, int ptlen, void *key, int keylen, void *ct, int *ctlen)
+unsigned long encrypt(const void *key, const size_t keylen, const void *pt, void *ct, const size_t tlen)
{
- return active->encrypt(pt, ptlen, key, keylen, ct, ctlen);
+ unsigned char iv[16] = INITIV;
+
+ assert(keylen == 16);
+ return ifs[which]->encrypt(key, keylen, iv, pt, ct, tlen);
}
-int decrypt(void *ct, int ctlen, void *key, int keylen, void *pt, int *ptlen)
+unsigned long decrypt(const void *key, const size_t keylen, const void *ct, void *pt, const size_t tlen)
{
- return active->decrypt(ct, ctlen, key, keylen, pt, ptlen);
+ unsigned char iv[16] = INITIV;
+
+ assert(keylen == 16);
+ return ifs[which]->decrypt(key, keylen, iv, ct, pt, tlen);
}
-int hash(void *pt, int ptlen, void *tag, int *taglen)
+unsigned long hash(const void *pt, const size_t tlen, void *tag, size_t *taglen)
{
- return active->hash(pt, ptlen, tag, taglen);
+ assert(*taglen == 20);
+ return ifs[which]->hash(pt, tlen, tag, taglen);
}
-int hmac(void *pt, int ptlen, void *key, int keylen, void *tag, int *taglen)
+unsigned long hmac(const void *key, const size_t keylen, const void *pt, const size_t tlen, void *tag, size_t *taglen)
{
- return active->hmac(pt, ptlen, key, keylen, tag, taglen);
+ assert(*taglen == 20);
+ return ifs[which]->hmac(key, keylen, pt, tlen, tag, taglen);
}
+const char *crypto_errstr(const unsigned long err)
+{
+ return ifs[which]->errstr(err);
+}