Commit 4af91ec0 authored by Andy Polyakov's avatar Andy Polyakov Committed by Dr. Stephen Henson
Browse files

ssl/s3_cbc.c: md_state alignment portability fix. 

RISCs are picky and alignment granted by compiler for md_state can be
insufficient for SHA512.
(cherry picked from commit 36260233e7e3396feed884d3f501283e0453c04f)
parent 6b2a8439

ssl/s3_cbc.c

+16 −15
Original line number Diff line number Diff line
@@ -415,7 +415,8 @@ void ssl3_cbc_digest_record( 
	unsigned mac_secret_length,

	char is_sslv3)

	{

	unsigned char md_state[sizeof(SHA512_CTX)];

	union {	double align;

		unsigned char c[sizeof(SHA512_CTX)]; } md_state;

	void (*md_final_raw)(void *ctx, unsigned char *md_out);

	void (*md_transform)(void *ctx, const unsigned char *block);

	unsigned md_size, md_block_size = 64;
@@ -441,32 +442,32 @@ void ssl3_cbc_digest_record( 
	switch (ctx->digest->type)

		{

		case NID_md5:

			MD5_Init((MD5_CTX*)md_state);

			MD5_Init((MD5_CTX*)md_state.c);

			md_final_raw = tls1_md5_final_raw;

			md_transform = (void(*)(void *ctx, const unsigned char *block)) MD5_Transform;

			md_size = 16;

			sslv3_pad_length = 48;

			break;

		case NID_sha1:

			SHA1_Init((SHA_CTX*)md_state);

			SHA1_Init((SHA_CTX*)md_state.c);

			md_final_raw = tls1_sha1_final_raw;

			md_transform = (void(*)(void *ctx, const unsigned char *block)) SHA1_Transform;

			md_size = 20;

			break;

		case NID_sha224:

			SHA224_Init((SHA256_CTX*)md_state);

			SHA224_Init((SHA256_CTX*)md_state.c);

			md_final_raw = tls1_sha256_final_raw;

			md_transform = (void(*)(void *ctx, const unsigned char *block)) SHA256_Transform;

			md_size = 224/8;

			break;

		case NID_sha256:

			SHA256_Init((SHA256_CTX*)md_state);

			SHA256_Init((SHA256_CTX*)md_state.c);

			md_final_raw = tls1_sha256_final_raw;

			md_transform = (void(*)(void *ctx, const unsigned char *block)) SHA256_Transform;

			md_size = 32;

			break;

		case NID_sha384:

			SHA384_Init((SHA512_CTX*)md_state);

			SHA384_Init((SHA512_CTX*)md_state.c);

			md_final_raw = tls1_sha512_final_raw;

			md_transform = (void(*)(void *ctx, const unsigned char *block)) SHA512_Transform;

			md_size = 384/8;
@@ -474,7 +475,7 @@ void ssl3_cbc_digest_record( 
			md_length_size = 16;

			break;

		case NID_sha512:

			SHA512_Init((SHA512_CTX*)md_state);

			SHA512_Init((SHA512_CTX*)md_state.c);

			md_final_raw = tls1_sha512_final_raw;

			md_transform = (void(*)(void *ctx, const unsigned char *block)) SHA512_Transform;

			md_size = 64;
@@ -579,7 +580,7 @@ void ssl3_cbc_digest_record( 
		for (i = 0; i < md_block_size; i++)

			hmac_pad[i] ^= 0x36;



		md_transform(md_state, hmac_pad);

		md_transform(md_state.c, hmac_pad);

		}



	memset(length_bytes,0,md_length_size-4);
@@ -597,21 +598,21 @@ void ssl3_cbc_digest_record( 
			 * block that the header consumes: either 7 bytes

			 * (SHA1) or 11 bytes (MD5). */

			unsigned overhang = header_length-md_block_size;

			md_transform(md_state, header);

			md_transform(md_state.c, header);

			memcpy(first_block, header + md_block_size, overhang);

			memcpy(first_block + overhang, data, md_block_size-overhang);

			md_transform(md_state, first_block);

			md_transform(md_state.c, first_block);

			for (i = 1; i < k/md_block_size - 1; i++)

				md_transform(md_state, data + md_block_size*i - overhang);

				md_transform(md_state.c, data + md_block_size*i - overhang);

			}

		else

			{

			/* k is a multiple of md_block_size. */

			memcpy(first_block, header, 13);

			memcpy(first_block+13, data, md_block_size-13);

			md_transform(md_state, first_block);

			md_transform(md_state.c, first_block);

			for (i = 1; i < k/md_block_size; i++)

				md_transform(md_state, data + md_block_size*i - 13);

				md_transform(md_state.c, data + md_block_size*i - 13);

			}

		}
@@ -661,8 +662,8 @@ void ssl3_cbc_digest_record( 
			block[j] = b;

			}



		md_transform(md_state, block);

		md_final_raw(md_state, block);

		md_transform(md_state.c, block);

		md_final_raw(md_state.c, block);

		/* If this is index_b, copy the hash value to |mac_out|. */

		for (j = 0; j < md_size; j++)

			mac_out[j] |= block[j]&is_block_b;