modes/ocb128.c: fix misaligned access in ILP32 builds on 64-bit processors.
One could have fixed the problem by arranging 64-bit alignment of
EVP_AES_OCB_CTX.aad_buf in evp/e_aes.c, but CRYPTO_ocb128_aad
prototype doesn't imply alignment and we have to honour it.
@@ -294,7 +294,7 @@ int CRYPTO_ocb128_aad(OCB128_CONTEXT *ctx, const unsigned char *aad,
/* Sum_i = Sum_{i-1} xor ENCIPHER(K, A_i xor Offset_i) */
aad_block = (OCB_BLOCK *)(aad + ((i - ctx->blocks_hashed - 1) * 16));
- ocb_block16_xor(&ctx->offset_aad, aad_block, &tmp1);
+ ocb_block16_xor_misaligned(&ctx->offset_aad, aad_block, &tmp1);
ctx->encrypt(tmp1.c, tmp2.c, ctx->keyenc);
ocb_block16_xor(&ctx->sum, &tmp2, &ctx->sum);
}
