Index: openssl/crypto/aes/aes_ctr.c |
=================================================================== |
--- openssl/crypto/aes/aes_ctr.c (revision 105093) |
+++ openssl/crypto/aes/aes_ctr.c (working copy) |
@@ -49,91 +49,13 @@ |
* |
*/ |
-#ifndef AES_DEBUG |
-# ifndef NDEBUG |
-# define NDEBUG |
-# endif |
-#endif |
-#include <assert.h> |
- |
#include <openssl/aes.h> |
-#include "aes_locl.h" |
+#include <openssl/modes.h> |
-/* NOTE: the IV/counter CTR mode is big-endian. The rest of the AES code |
- * is endian-neutral. */ |
- |
-/* increment counter (128-bit int) by 1 */ |
-static void AES_ctr128_inc(unsigned char *counter) { |
- unsigned long c; |
- |
- /* Grab bottom dword of counter and increment */ |
- c = GETU32(counter + 12); |
- c++; c &= 0xFFFFFFFF; |
- PUTU32(counter + 12, c); |
- |
- /* if no overflow, we're done */ |
- if (c) |
- return; |
- |
- /* Grab 1st dword of counter and increment */ |
- c = GETU32(counter + 8); |
- c++; c &= 0xFFFFFFFF; |
- PUTU32(counter + 8, c); |
- |
- /* if no overflow, we're done */ |
- if (c) |
- return; |
- |
- /* Grab 2nd dword of counter and increment */ |
- c = GETU32(counter + 4); |
- c++; c &= 0xFFFFFFFF; |
- PUTU32(counter + 4, c); |
- |
- /* if no overflow, we're done */ |
- if (c) |
- return; |
- |
- /* Grab top dword of counter and increment */ |
- c = GETU32(counter + 0); |
- c++; c &= 0xFFFFFFFF; |
- PUTU32(counter + 0, c); |
-} |
- |
-/* The input encrypted as though 128bit counter mode is being |
- * used. The extra state information to record how much of the |
- * 128bit block we have used is contained in *num, and the |
- * encrypted counter is kept in ecount_buf. Both *num and |
- * ecount_buf must be initialised with zeros before the first |
- * call to AES_ctr128_encrypt(). |
- * |
- * This algorithm assumes that the counter is in the x lower bits |
- * of the IV (ivec), and that the application has full control over |
- * overflow and the rest of the IV. This implementation takes NO |
- * responsability for checking that the counter doesn't overflow |
- * into the rest of the IV when incremented. |
- */ |
void AES_ctr128_encrypt(const unsigned char *in, unsigned char *out, |
- const unsigned long length, const AES_KEY *key, |
- unsigned char ivec[AES_BLOCK_SIZE], |
- unsigned char ecount_buf[AES_BLOCK_SIZE], |
- unsigned int *num) { |
- |
- unsigned int n; |
- unsigned long l=length; |
- |
- assert(in && out && key && counter && num); |
- assert(*num < AES_BLOCK_SIZE); |
- |
- n = *num; |
- |
- while (l--) { |
- if (n == 0) { |
- AES_encrypt(ivec, ecount_buf, key); |
- AES_ctr128_inc(ivec); |
- } |
- *(out++) = *(in++) ^ ecount_buf[n]; |
- n = (n+1) % AES_BLOCK_SIZE; |
- } |
- |
- *num=n; |
+ size_t length, const AES_KEY *key, |
+ unsigned char ivec[AES_BLOCK_SIZE], |
+ unsigned char ecount_buf[AES_BLOCK_SIZE], |
+ unsigned int *num) { |
+ CRYPTO_ctr128_encrypt(in,out,length,key,ivec,ecount_buf,num,(block128_f)AES_encrypt); |
} |