}
byteReverse(ctx->in, 14);
- /* Append length in bits and transform */
- ((uint32_t *) ctx->in)[14] = ctx->bits[0];
- ((uint32_t *) ctx->in)[15] = ctx->bits[1];
+ /* Append length in bits and transform.
+ * Use memcpy to avoid strict-aliasing problems.
+ * This way it can be optimized.
+ */
+ memcpy(&ctx->in[14 * sizeof(uint32_t)], &ctx->bits[0], sizeof(uint32_t));
+ memcpy(&ctx->in[15 * sizeof(uint32_t)], &ctx->bits[1], sizeof(uint32_t));
MD5Transform(ctx->buf, (uint32_t *) ctx->in);
byteReverse((uint8_t *) ctx->buf, 4);