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author | marha <marha@users.sourceforge.net> | 2010-03-29 17:08:02 +0000 |
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committer | marha <marha@users.sourceforge.net> | 2010-03-29 17:08:02 +0000 |
commit | 15272ab4ed1e6250412fccd48200ed9eae59608f (patch) | |
tree | a5996ea67966a778a16565f19dfc2e7c7f49b376 /openssl/crypto/aes/aes_ctr.c | |
parent | 3827301b2ea5a45ac009c3bf9f08586ff40b8506 (diff) | |
download | vcxsrv-15272ab4ed1e6250412fccd48200ed9eae59608f.tar.gz vcxsrv-15272ab4ed1e6250412fccd48200ed9eae59608f.tar.bz2 vcxsrv-15272ab4ed1e6250412fccd48200ed9eae59608f.zip |
Updated to openssl 1.0.0
Diffstat (limited to 'openssl/crypto/aes/aes_ctr.c')
-rw-r--r-- | openssl/crypto/aes/aes_ctr.c | 90 |
1 files changed, 6 insertions, 84 deletions
diff --git a/openssl/crypto/aes/aes_ctr.c b/openssl/crypto/aes/aes_ctr.c index f36982be1..7c9d165d8 100644 --- a/openssl/crypto/aes/aes_ctr.c +++ b/openssl/crypto/aes/aes_ctr.c @@ -49,91 +49,13 @@ * */ -#ifndef AES_DEBUG -# ifndef NDEBUG -# define NDEBUG -# endif -#endif -#include <assert.h> - #include <openssl/aes.h> -#include "aes_locl.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; +#include <openssl/modes.h> - /* 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); } |