commit 49ecee098d062b92fcf095e05e15779c32899646
author Denys Vlasenko <vda.linux@googlemail.com> Tue Jan 24 16:00:54 2017 +0100
committer Denys Vlasenko <vda.linux@googlemail.com> Tue Jan 24 16:00:54 2017 +0100
tree a02df1cfc23064d3f37a7adb15e1dafdf7a76c97
parent 9a64c3337cc0a5e84e9ad457eeb1d475c311e9fc

tls: add 2nd cipher_id, TLS_RSA_WITH_AES_128_CBC_SHA, so far it doesn't work

Good news that TLS_RSA_WITH_AES_256_CBC_SHA256 still works with new code ;)

This change adds inevitable extension to have different sized hashes and AES key sizes.
In libbb, md5_end() and shaX_end() are extended to return result size instead of void -
this helps *a lot* in tls (the cost is ~5 bytes per _end() function).

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

libbb/hash_md5_sha.c

diff --git a/libbb/hash_md5_sha.c b/libbb/hash_md5_sha.c
index d325584..2a72474 100644
--- a/libbb/hash_md5_sha.c
+++ b/libbb/hash_md5_sha.c
@@ -458,7 +458,7 @@
  * endian byte order, so that a byte-wise output yields to the wanted
  * ASCII representation of the message digest.
  */
-void FAST_FUNC md5_end(md5_ctx_t *ctx, void *resbuf)
+unsigned FAST_FUNC md5_end(md5_ctx_t *ctx, void *resbuf)
 {
 	/* MD5 stores total in LE, need to swap on BE arches: */
 	common64_end(ctx, /*swap_needed:*/ BB_BIG_ENDIAN);
@@ -472,6 +472,7 @@
 	}
 
 	memcpy(resbuf, ctx->hash, sizeof(ctx->hash[0]) * 4);
+	return sizeof(ctx->hash[0]) * 4;
 }
 
 
@@ -865,7 +866,7 @@
 #endif /* NEED_SHA512 */
 
 /* Used also for sha256 */
-void FAST_FUNC sha1_end(sha1_ctx_t *ctx, void *resbuf)
+unsigned FAST_FUNC sha1_end(sha1_ctx_t *ctx, void *resbuf)
 {
 	unsigned hash_size;
 
@@ -879,11 +880,13 @@
 		for (i = 0; i < hash_size; ++i)
 			ctx->hash[i] = SWAP_BE32(ctx->hash[i]);
 	}
-	memcpy(resbuf, ctx->hash, sizeof(ctx->hash[0]) * hash_size);
+	hash_size *= sizeof(ctx->hash[0]);
+	memcpy(resbuf, ctx->hash, hash_size);
+	return hash_size;
 }
 
 #if NEED_SHA512
-void FAST_FUNC sha512_end(sha512_ctx_t *ctx, void *resbuf)
+unsigned FAST_FUNC sha512_end(sha512_ctx_t *ctx, void *resbuf)
 {
 	unsigned bufpos = ctx->total64[0] & 127;
 
@@ -915,6 +918,7 @@
 			ctx->hash[i] = SWAP_BE64(ctx->hash[i]);
 	}
 	memcpy(resbuf, ctx->hash, sizeof(ctx->hash));
+	return sizeof(ctx->hash);
 }
 #endif /* NEED_SHA512 */
 
@@ -1450,7 +1454,7 @@
 #endif
 }
 
-void FAST_FUNC sha3_end(sha3_ctx_t *ctx, void *resbuf)
+unsigned FAST_FUNC sha3_end(sha3_ctx_t *ctx, void *resbuf)
 {
 	/* Padding */
 	uint8_t *buf = (uint8_t*)ctx->state;
@@ -1475,4 +1479,5 @@
 
 	/* Output */
 	memcpy(resbuf, ctx->state, 64);
+	return 64;
 }