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- jsing@cvs.openbsd.org 2014/07/03 12:42:16

Browse Source 
[cipher-chachapoly.c]
     Call chacha_ivsetup() immediately before chacha_encrypt_bytes() - this
     makes it easier to verify that chacha_encrypt_bytes() is only called once
     per chacha_ivsetup() call.
     ok djm@
This commit is contained in:
Damien Miller 2014-07-04 08:59:01 +10:00
parent 686feb560e
commit d2c3cd5f2e
2 changed files with 15 additions and 3 deletions
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10
ChangeLog
View File

@ -1,3 +1,13 @@
20140704
- OpenBSD CVS Sync
- jsing@cvs.openbsd.org 2014/07/03 12:42:16
[cipher-chachapoly.c]
Call chacha_ivsetup() immediately before chacha_encrypt_bytes() - this
makes it easier to verify that chacha_encrypt_bytes() is only called once
per chacha_ivsetup() call.
ok djm@
20140703
- (djm) [digest-openssl.c configure.ac] Disable RIPEMD160 if libcrypto
doesn't support it.

8
cipher-chachapoly.c
View File

@ -14,7 +14,7 @@
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* $OpenBSD: cipher-chachapoly.c,v 1.5 2014/06/24 01:13:21 djm Exp $ */
/* $OpenBSD: cipher-chachapoly.c,v 1.6 2014/07/03 12:42:16 jsing Exp $ */
#include "includes.h"
@ -65,8 +65,6 @@ chachapoly_crypt(struct chachapoly_ctx *ctx, u_int seqnr, u_char *dest,
chacha_ivsetup(&ctx->main_ctx, seqbuf, NULL);
chacha_encrypt_bytes(&ctx->main_ctx,
poly_key, poly_key, sizeof(poly_key));
/* Set Chacha's block counter to 1 */
chacha_ivsetup(&ctx->main_ctx, seqbuf, one);
/* If decrypting, check tag before anything else */
if (!do_encrypt) {
@ -78,11 +76,15 @@ chachapoly_crypt(struct chachapoly_ctx *ctx, u_int seqnr, u_char *dest,
goto out;
}
}
/* Crypt additional data */
if (aadlen) {
chacha_ivsetup(&ctx->header_ctx, seqbuf, NULL);
chacha_encrypt_bytes(&ctx->header_ctx, src, dest, aadlen);
}
/* Set Chacha's block counter to 1 */
chacha_ivsetup(&ctx->main_ctx, seqbuf, one);
chacha_encrypt_bytes(&ctx->main_ctx, src + aadlen,
dest + aadlen, len);