+ const unsigned char *in, size_t len)
+{
+ EVP_AES_HMAC_SHA1 *key = data(ctx);
+ unsigned int l;
+ size_t plen = key->payload_length, iv = 0, /* explicit IV in TLS 1.1 and
+ * later */
+ sha_off = 0;
+# if defined(STITCHED_CALL)
+ size_t aes_off = 0, blocks;
+
+ sha_off = SHA_CBLOCK - key->md.num;
+# endif
+
+ key->payload_length = NO_PAYLOAD_LENGTH;
+
+ if (len % AES_BLOCK_SIZE)
+ return 0;
+
+ if (EVP_CIPHER_CTX_encrypting(ctx)) {
+ if (plen == NO_PAYLOAD_LENGTH)
+ plen = len;
+ else if (len !=
+ ((plen + SHA_DIGEST_LENGTH +
+ AES_BLOCK_SIZE) & -AES_BLOCK_SIZE))
+ return 0;
+ else if (key->aux.tls_ver >= TLS1_1_VERSION)
+ iv = AES_BLOCK_SIZE;
+
+# if defined(STITCHED_CALL)
+ if (plen > (sha_off + iv)
+ && (blocks = (plen - (sha_off + iv)) / SHA_CBLOCK)) {
+ SHA1_Update(&key->md, in + iv, sha_off);
+
+ aesni_cbc_sha1_enc(in, out, blocks, &key->ks,
+ EVP_CIPHER_CTX_iv_noconst(ctx),
+ &key->md, in + iv + sha_off);
+ blocks *= SHA_CBLOCK;
+ aes_off += blocks;
+ sha_off += blocks;
+ key->md.Nh += blocks >> 29;
+ key->md.Nl += blocks <<= 3;
+ if (key->md.Nl < (unsigned int)blocks)
+ key->md.Nh++;
+ } else {
+ sha_off = 0;
+ }
+# endif
+ sha_off += iv;
+ SHA1_Update(&key->md, in + sha_off, plen - sha_off);
+
+ if (plen != len) { /* "TLS" mode of operation */
+ if (in != out)
+ memcpy(out + aes_off, in + aes_off, plen - aes_off);
+
+ /* calculate HMAC and append it to payload */
+ SHA1_Final(out + plen, &key->md);
+ key->md = key->tail;
+ SHA1_Update(&key->md, out + plen, SHA_DIGEST_LENGTH);
+ SHA1_Final(out + plen, &key->md);
+
+ /* pad the payload|hmac */
+ plen += SHA_DIGEST_LENGTH;
+ for (l = len - plen - 1; plen < len; plen++)
+ out[plen] = l;
+ /* encrypt HMAC|padding at once */
+ aesni_cbc_encrypt(out + aes_off, out + aes_off, len - aes_off,
+ &key->ks, EVP_CIPHER_CTX_iv_noconst(ctx), 1);
+ } else {
+ aesni_cbc_encrypt(in + aes_off, out + aes_off, len - aes_off,
+ &key->ks, EVP_CIPHER_CTX_iv_noconst(ctx), 1);
+ }
+ } else {
+ union {
+ unsigned int u[SHA_DIGEST_LENGTH / sizeof(unsigned int)];
+ unsigned char c[32 + SHA_DIGEST_LENGTH];
+ } mac, *pmac;
+
+ /* arrange cache line alignment */
+ pmac = (void *)(((size_t)mac.c + 31) & ((size_t)0 - 32));
+
+ if (plen != NO_PAYLOAD_LENGTH) { /* "TLS" mode of operation */
+ size_t inp_len, mask, j, i;
+ unsigned int res, maxpad, pad, bitlen;
+ int ret = 1;
+ union {
+ unsigned int u[SHA_LBLOCK];
+ unsigned char c[SHA_CBLOCK];
+ } *data = (void *)key->md.data;
+# if defined(STITCHED_DECRYPT_CALL)
+ unsigned char tail_iv[AES_BLOCK_SIZE];
+ int stitch = 0;
+# endif
+
+ if ((key->aux.tls_aad[plen - 4] << 8 | key->aux.tls_aad[plen - 3])
+ >= TLS1_1_VERSION) {
+ if (len < (AES_BLOCK_SIZE + SHA_DIGEST_LENGTH + 1))
+ return 0;
+
+ /* omit explicit iv */
+ memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), in, AES_BLOCK_SIZE);
+
+ in += AES_BLOCK_SIZE;
+ out += AES_BLOCK_SIZE;
+ len -= AES_BLOCK_SIZE;
+ } else if (len < (SHA_DIGEST_LENGTH + 1))
+ return 0;
+
+# if defined(STITCHED_DECRYPT_CALL)
+ if (len >= 1024 && ctx->key_len == 32) {
+ /* decrypt last block */
+ memcpy(tail_iv, in + len - 2 * AES_BLOCK_SIZE,
+ AES_BLOCK_SIZE);
+ aesni_cbc_encrypt(in + len - AES_BLOCK_SIZE,
+ out + len - AES_BLOCK_SIZE, AES_BLOCK_SIZE,
+ &key->ks, tail_iv, 0);
+ stitch = 1;
+ } else
+# endif
+ /* decrypt HMAC|padding at once */
+ aesni_cbc_encrypt(in, out, len, &key->ks,
+ EVP_CIPHER_CTX_iv_noconst(ctx), 0);
+
+ /* figure out payload length */
+ pad = out[len - 1];
+ maxpad = len - (SHA_DIGEST_LENGTH + 1);
+ maxpad |= (255 - maxpad) >> (sizeof(maxpad) * 8 - 8);
+ maxpad &= 255;
+
+ ret &= constant_time_ge(maxpad, pad);
+
+ inp_len = len - (SHA_DIGEST_LENGTH + pad + 1);
+ mask = (0 - ((inp_len - len) >> (sizeof(inp_len) * 8 - 1)));
+ inp_len &= mask;
+ ret &= (int)mask;
+
+ key->aux.tls_aad[plen - 2] = inp_len >> 8;
+ key->aux.tls_aad[plen - 1] = inp_len;
+
+ /* calculate HMAC */
+ key->md = key->head;
+ SHA1_Update(&key->md, key->aux.tls_aad, plen);
+
+# if defined(STITCHED_DECRYPT_CALL)
+ if (stitch) {
+ blocks = (len - (256 + 32 + SHA_CBLOCK)) / SHA_CBLOCK;
+ aes_off = len - AES_BLOCK_SIZE - blocks * SHA_CBLOCK;
+ sha_off = SHA_CBLOCK - plen;
+
+ aesni_cbc_encrypt(in, out, aes_off, &key->ks, ctx->iv, 0);
+
+ SHA1_Update(&key->md, out, sha_off);
+ aesni256_cbc_sha1_dec(in + aes_off,
+ out + aes_off, blocks, &key->ks,
+ ctx->iv, &key->md, out + sha_off);
+
+ sha_off += blocks *= SHA_CBLOCK;
+ out += sha_off;
+ len -= sha_off;
+ inp_len -= sha_off;
+
+ key->md.Nl += (blocks << 3); /* at most 18 bits */
+ memcpy(ctx->iv, tail_iv, AES_BLOCK_SIZE);
+ }
+# endif
+
+# if 1
+ len -= SHA_DIGEST_LENGTH; /* amend mac */
+ if (len >= (256 + SHA_CBLOCK)) {
+ j = (len - (256 + SHA_CBLOCK)) & (0 - SHA_CBLOCK);
+ j += SHA_CBLOCK - key->md.num;
+ SHA1_Update(&key->md, out, j);
+ out += j;
+ len -= j;
+ inp_len -= j;
+ }
+
+ /* but pretend as if we hashed padded payload */
+ bitlen = key->md.Nl + (inp_len << 3); /* at most 18 bits */
+# ifdef BSWAP4
+ bitlen = BSWAP4(bitlen);
+# else
+ mac.c[0] = 0;
+ mac.c[1] = (unsigned char)(bitlen >> 16);
+ mac.c[2] = (unsigned char)(bitlen >> 8);
+ mac.c[3] = (unsigned char)bitlen;
+ bitlen = mac.u[0];
+# endif
+
+ pmac->u[0] = 0;
+ pmac->u[1] = 0;
+ pmac->u[2] = 0;
+ pmac->u[3] = 0;
+ pmac->u[4] = 0;
+
+ for (res = key->md.num, j = 0; j < len; j++) {
+ size_t c = out[j];
+ mask = (j - inp_len) >> (sizeof(j) * 8 - 8);
+ c &= mask;
+ c |= 0x80 & ~mask & ~((inp_len - j) >> (sizeof(j) * 8 - 8));
+ data->c[res++] = (unsigned char)c;
+
+ if (res != SHA_CBLOCK)
+ continue;
+
+ /* j is not incremented yet */
+ mask = 0 - ((inp_len + 7 - j) >> (sizeof(j) * 8 - 1));
+ data->u[SHA_LBLOCK - 1] |= bitlen & mask;
+ sha1_block_data_order(&key->md, data, 1);
+ mask &= 0 - ((j - inp_len - 72) >> (sizeof(j) * 8 - 1));
+ pmac->u[0] |= key->md.h0 & mask;
+ pmac->u[1] |= key->md.h1 & mask;
+ pmac->u[2] |= key->md.h2 & mask;
+ pmac->u[3] |= key->md.h3 & mask;
+ pmac->u[4] |= key->md.h4 & mask;
+ res = 0;
+ }
+
+ for (i = res; i < SHA_CBLOCK; i++, j++)
+ data->c[i] = 0;
+
+ if (res > SHA_CBLOCK - 8) {
+ mask = 0 - ((inp_len + 8 - j) >> (sizeof(j) * 8 - 1));
+ data->u[SHA_LBLOCK - 1] |= bitlen & mask;
+ sha1_block_data_order(&key->md, data, 1);
+ mask &= 0 - ((j - inp_len - 73) >> (sizeof(j) * 8 - 1));
+ pmac->u[0] |= key->md.h0 & mask;
+ pmac->u[1] |= key->md.h1 & mask;
+ pmac->u[2] |= key->md.h2 & mask;
+ pmac->u[3] |= key->md.h3 & mask;
+ pmac->u[4] |= key->md.h4 & mask;
+
+ memset(data, 0, SHA_CBLOCK);
+ j += 64;
+ }
+ data->u[SHA_LBLOCK - 1] = bitlen;
+ sha1_block_data_order(&key->md, data, 1);
+ mask = 0 - ((j - inp_len - 73) >> (sizeof(j) * 8 - 1));
+ pmac->u[0] |= key->md.h0 & mask;
+ pmac->u[1] |= key->md.h1 & mask;
+ pmac->u[2] |= key->md.h2 & mask;
+ pmac->u[3] |= key->md.h3 & mask;
+ pmac->u[4] |= key->md.h4 & mask;
+
+# ifdef BSWAP4
+ pmac->u[0] = BSWAP4(pmac->u[0]);
+ pmac->u[1] = BSWAP4(pmac->u[1]);
+ pmac->u[2] = BSWAP4(pmac->u[2]);
+ pmac->u[3] = BSWAP4(pmac->u[3]);
+ pmac->u[4] = BSWAP4(pmac->u[4]);
+# else
+ for (i = 0; i < 5; i++) {
+ res = pmac->u[i];
+ pmac->c[4 * i + 0] = (unsigned char)(res >> 24);
+ pmac->c[4 * i + 1] = (unsigned char)(res >> 16);
+ pmac->c[4 * i + 2] = (unsigned char)(res >> 8);
+ pmac->c[4 * i + 3] = (unsigned char)res;
+ }
+# endif
+ len += SHA_DIGEST_LENGTH;
+# else
+ SHA1_Update(&key->md, out, inp_len);
+ res = key->md.num;
+ SHA1_Final(pmac->c, &key->md);
+
+ {
+ unsigned int inp_blocks, pad_blocks;
+
+ /* but pretend as if we hashed padded payload */
+ inp_blocks =
+ 1 + ((SHA_CBLOCK - 9 - res) >> (sizeof(res) * 8 - 1));
+ res += (unsigned int)(len - inp_len);
+ pad_blocks = res / SHA_CBLOCK;
+ res %= SHA_CBLOCK;
+ pad_blocks +=
+ 1 + ((SHA_CBLOCK - 9 - res) >> (sizeof(res) * 8 - 1));
+ for (; inp_blocks < pad_blocks; inp_blocks++)
+ sha1_block_data_order(&key->md, data, 1);
+ }
+# endif
+ key->md = key->tail;
+ SHA1_Update(&key->md, pmac->c, SHA_DIGEST_LENGTH);
+ SHA1_Final(pmac->c, &key->md);
+
+ /* verify HMAC */
+ out += inp_len;
+ len -= inp_len;
+# if 1
+ {
+ unsigned char *p = out + len - 1 - maxpad - SHA_DIGEST_LENGTH;
+ size_t off = out - p;
+ unsigned int c, cmask;
+
+ maxpad += SHA_DIGEST_LENGTH;
+ for (res = 0, i = 0, j = 0; j < maxpad; j++) {
+ c = p[j];
+ cmask =
+ ((int)(j - off - SHA_DIGEST_LENGTH)) >> (sizeof(int) *
+ 8 - 1);
+ res |= (c ^ pad) & ~cmask; /* ... and padding */
+ cmask &= ((int)(off - 1 - j)) >> (sizeof(int) * 8 - 1);
+ res |= (c ^ pmac->c[i]) & cmask;
+ i += 1 & cmask;
+ }
+ maxpad -= SHA_DIGEST_LENGTH;
+
+ res = 0 - ((0 - res) >> (sizeof(res) * 8 - 1));
+ ret &= (int)~res;
+ }
+# else
+ for (res = 0, i = 0; i < SHA_DIGEST_LENGTH; i++)
+ res |= out[i] ^ pmac->c[i];
+ res = 0 - ((0 - res) >> (sizeof(res) * 8 - 1));
+ ret &= (int)~res;
+
+ /* verify padding */
+ pad = (pad & ~res) | (maxpad & res);
+ out = out + len - 1 - pad;
+ for (res = 0, i = 0; i < pad; i++)
+ res |= out[i] ^ pad;
+
+ res = (0 - res) >> (sizeof(res) * 8 - 1);
+ ret &= (int)~res;
+# endif
+ return ret;
+ } else {
+# if defined(STITCHED_DECRYPT_CALL)
+ if (len >= 1024 && ctx->key_len == 32) {
+ if (sha_off %= SHA_CBLOCK)
+ blocks = (len - 3 * SHA_CBLOCK) / SHA_CBLOCK;
+ else
+ blocks = (len - 2 * SHA_CBLOCK) / SHA_CBLOCK;
+ aes_off = len - blocks * SHA_CBLOCK;
+
+ aesni_cbc_encrypt(in, out, aes_off, &key->ks, ctx->iv, 0);
+ SHA1_Update(&key->md, out, sha_off);
+ aesni256_cbc_sha1_dec(in + aes_off,
+ out + aes_off, blocks, &key->ks,
+ ctx->iv, &key->md, out + sha_off);
+
+ sha_off += blocks *= SHA_CBLOCK;
+ out += sha_off;
+ len -= sha_off;
+
+ key->md.Nh += blocks >> 29;
+ key->md.Nl += blocks <<= 3;
+ if (key->md.Nl < (unsigned int)blocks)
+ key->md.Nh++;
+ } else
+# endif
+ /* decrypt HMAC|padding at once */
+ aesni_cbc_encrypt(in, out, len, &key->ks,
+ EVP_CIPHER_CTX_iv_noconst(ctx), 0);
+
+ SHA1_Update(&key->md, out, len);
+ }
+ }
+
+ return 1;
+}