X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=crypto%2Faes%2Faes_ctr.c;h=7c9d165d8adbf35a6054e42032eb342164ca0a71;hp=5a1ced67f85fb91fefe91421601e352aee69bf7b;hb=0e3ef596e55654a7782ae7ce302f8933b4817f12;hpb=da0d33560f78b7c430a20981f2cf125d56926899

diff --git a/crypto/aes/aes_ctr.c b/crypto/aes/aes_ctr.c
index 5a1ced67f8..7c9d165d8a 100644
--- a/crypto/aes/aes_ctr.c
+++ b/crypto/aes/aes_ctr.c
@@ -49,116 +49,13 @@
  *
  */
 
-#ifndef AES_DEBUG
-# ifndef NDEBUG
-#  define NDEBUG
-# endif
-#endif
-#include <assert.h>
-
 #include <openssl/aes.h>
-#include "aes_locl.h"
-
-/* NOTE: 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 */
-#ifdef L_ENDIAN
-	c = GETU32(counter +  0);
-	c++;
-	PUTU32(counter +  0, c);
-#else
-	c = GETU32(counter + 12);
-	c++;
-	PUTU32(counter + 12, c);
-#endif
-
-	/* if no overflow, we're done */
-	if (c)
-		return;
-
-	/* Grab 1st dword of counter and increment */
-#ifdef L_ENDIAN
-	c = GETU32(counter +  4);
-	c++;
-	PUTU32(counter +  4, c);
-#else
-	c = GETU32(counter +  8);
-	c++;
-	PUTU32(counter +  8, c);
-#endif
-
-	/* if no overflow, we're done */
-	if (c)
-		return;
-
-	/* Grab 2nd dword of counter and increment */
-#ifdef L_ENDIAN
-	c = GETU32(counter +  8);
-	c++;
-	PUTU32(counter +  8, c);
-#else
-	c = GETU32(counter +  4);
-	c++;
-	PUTU32(counter +  4, c);
-#endif
-
-	/* if no overflow, we're done */
-	if (c)
-		return;
-
-	/* Grab top dword of counter and increment */
-#ifdef L_ENDIAN
-	c = GETU32(counter + 12);
-	c++;
-	PUTU32(counter + 12, c);
-#else
-	c = GETU32(counter +  0);
-	c++;
-	PUTU32(counter +  0, c);
-#endif
+#include <openssl/modes.h>
 
-}
-
-/* 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(counter, ecount_buf, key);
-			AES_ctr128_inc(counter);
-		}
-		*(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);
 }