+#ifndef OPENSSL_NO_TLSEXT
+int ssl3_send_newsession_ticket(SSL *s)
+ {
+ if (s->state == SSL3_ST_SW_SESSION_TICKET_A)
+ {
+ unsigned char *p, *senc, *macstart;
+ int len, slen;
+ unsigned int hlen;
+ EVP_CIPHER_CTX ctx;
+ HMAC_CTX hctx;
+ SSL_CTX *tctx = s->initial_ctx;
+ unsigned char iv[EVP_MAX_IV_LENGTH];
+ unsigned char key_name[16];
+
+ /* get session encoding length */
+ slen = i2d_SSL_SESSION(s->session, NULL);
+ /* Some length values are 16 bits, so forget it if session is
+ * too long
+ */
+ if (slen > 0xFF00)
+ return -1;
+ /* Grow buffer if need be: the length calculation is as
+ * follows 1 (size of message name) + 3 (message length
+ * bytes) + 4 (ticket lifetime hint) + 2 (ticket length) +
+ * 16 (key name) + max_iv_len (iv length) +
+ * session_length + max_enc_block_size (max encrypted session
+ * length) + max_md_size (HMAC).
+ */
+ if (!BUF_MEM_grow(s->init_buf,
+ 26 + EVP_MAX_IV_LENGTH + EVP_MAX_BLOCK_LENGTH +
+ EVP_MAX_MD_SIZE + slen))
+ return -1;
+ senc = OPENSSL_malloc(slen);
+ if (!senc)
+ return -1;
+ p = senc;
+ i2d_SSL_SESSION(s->session, &p);
+
+ p=(unsigned char *)s->init_buf->data;
+ /* do the header */
+ *(p++)=SSL3_MT_NEWSESSION_TICKET;
+ /* Skip message length for now */
+ p += 3;
+ EVP_CIPHER_CTX_init(&ctx);
+ HMAC_CTX_init(&hctx);
+ /* Initialize HMAC and cipher contexts. If callback present
+ * it does all the work otherwise use generated values
+ * from parent ctx.
+ */
+ if (tctx->tlsext_ticket_key_cb)
+ {
+ if (tctx->tlsext_ticket_key_cb(s, key_name, iv, &ctx,
+ &hctx, 1) < 0)
+ {
+ OPENSSL_free(senc);
+ return -1;
+ }
+ }
+ else
+ {
+ RAND_pseudo_bytes(iv, 16);
+ EVP_EncryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL,
+ tctx->tlsext_tick_aes_key, iv);
+ HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16,
+ tlsext_tick_md(), NULL);
+ memcpy(key_name, tctx->tlsext_tick_key_name, 16);
+ }
+ l2n(s->session->tlsext_tick_lifetime_hint, p);
+ /* Skip ticket length for now */
+ p += 2;
+ /* Output key name */
+ macstart = p;
+ memcpy(p, key_name, 16);
+ p += 16;
+ /* output IV */
+ memcpy(p, iv, EVP_CIPHER_CTX_iv_length(&ctx));
+ p += EVP_CIPHER_CTX_iv_length(&ctx);
+ /* Encrypt session data */
+ EVP_EncryptUpdate(&ctx, p, &len, senc, slen);
+ p += len;
+ EVP_EncryptFinal(&ctx, p, &len);
+ p += len;
+ EVP_CIPHER_CTX_cleanup(&ctx);
+
+ HMAC_Update(&hctx, macstart, p - macstart);
+ HMAC_Final(&hctx, p, &hlen);
+ HMAC_CTX_cleanup(&hctx);
+
+ p += hlen;
+ /* Now write out lengths: p points to end of data written */
+ /* Total length */
+ len = p - (unsigned char *)s->init_buf->data;
+ p=(unsigned char *)s->init_buf->data + 1;
+ l2n3(len - 4, p); /* Message length */
+ p += 4;
+ s2n(len - 10, p); /* Ticket length */
+
+ /* number of bytes to write */
+ s->init_num= len;
+ s->state=SSL3_ST_SW_SESSION_TICKET_B;
+ s->init_off=0;
+ OPENSSL_free(senc);
+ }
+
+ /* SSL3_ST_SW_SESSION_TICKET_B */
+ return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
+ }
+
+int ssl3_send_cert_status(SSL *s)
+ {
+ if (s->state == SSL3_ST_SW_CERT_STATUS_A)
+ {
+ unsigned char *p;
+ /* Grow buffer if need be: the length calculation is as
+ * follows 1 (message type) + 3 (message length) +
+ * 1 (ocsp response type) + 3 (ocsp response length)
+ * + (ocsp response)
+ */
+ if (!BUF_MEM_grow(s->init_buf, 8 + s->tlsext_ocsp_resplen))
+ return -1;
+
+ p=(unsigned char *)s->init_buf->data;
+
+ /* do the header */
+ *(p++)=SSL3_MT_CERTIFICATE_STATUS;
+ /* message length */
+ l2n3(s->tlsext_ocsp_resplen + 4, p);
+ /* status type */
+ *(p++)= s->tlsext_status_type;
+ /* length of OCSP response */
+ l2n3(s->tlsext_ocsp_resplen, p);
+ /* actual response */
+ memcpy(p, s->tlsext_ocsp_resp, s->tlsext_ocsp_resplen);
+ /* number of bytes to write */
+ s->init_num = 8 + s->tlsext_ocsp_resplen;
+ s->state=SSL3_ST_SW_CERT_STATUS_B;
+ s->init_off = 0;
+ }
+
+ /* SSL3_ST_SW_CERT_STATUS_B */
+ return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
+ }
+#endif
projects / openssl.git / blobdiff