EXT_RETURN tls_construct_stoc_early_data(SSL *s, WPACKET *pkt, unsigned int context, X509 *x, size_t chainidx, int *al) { if (context == SSL_EXT_TLS1_3_NEW_SESSION_TICKET) { if (s->max_early_data == 0) return EXT_RETURN_NOT_SENT; if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data) || !WPACKET_start_sub_packet_u16(pkt) || !WPACKET_put_bytes_u32(pkt, s->max_early_data) || !WPACKET_close(pkt)) { SSLerr(SSL_F_TLS_CONSTRUCT_STOC_EARLY_DATA, ERR_R_INTERNAL_ERROR); return EXT_RETURN_FAIL; } return EXT_RETURN_SENT; } if (s->ext.early_data != SSL_EARLY_DATA_ACCEPTED) return EXT_RETURN_NOT_SENT; if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data) || !WPACKET_start_sub_packet_u16(pkt) || !WPACKET_close(pkt)) { SSLerr(SSL_F_TLS_CONSTRUCT_STOC_EARLY_DATA, ERR_R_INTERNAL_ERROR); return EXT_RETURN_FAIL; } return EXT_RETURN_SENT; }
int tls_construct_ctos_status_request(SSL *s, WPACKET *pkt, int *al) { int i; if (s->tlsext_status_type != TLSEXT_STATUSTYPE_ocsp) return 1; if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_status_request) /* Sub-packet for status request extension */ || !WPACKET_start_sub_packet_u16(pkt) || !WPACKET_put_bytes_u8(pkt, TLSEXT_STATUSTYPE_ocsp) /* Sub-packet for the ids */ || !WPACKET_start_sub_packet_u16(pkt)) { SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); return 0; } for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++) { unsigned char *idbytes; OCSP_RESPID *id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i); int idlen = i2d_OCSP_RESPID(id, NULL); if (idlen <= 0 /* Sub-packet for an individual id */ || !WPACKET_sub_allocate_bytes_u16(pkt, idlen, &idbytes) || i2d_OCSP_RESPID(id, &idbytes) != idlen) { SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); return 0; } } if (!WPACKET_close(pkt) || !WPACKET_start_sub_packet_u16(pkt)) { SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); return 0; } if (s->tlsext_ocsp_exts) { unsigned char *extbytes; int extlen = i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, NULL); if (extlen < 0) { SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); return 0; } if (!WPACKET_allocate_bytes(pkt, extlen, &extbytes) || i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, &extbytes) != extlen) { SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); return 0; } } if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); return 0; } return 1; }
EXT_RETURN tls_construct_stoc_supported_groups(SSL *s, WPACKET *pkt, unsigned int context, X509 *x, size_t chainidx, int *al) { const unsigned char *groups; size_t numgroups, i, first = 1; /* s->s3->group_id is non zero if we accepted a key_share */ if (s->s3->group_id == 0) return EXT_RETURN_NOT_SENT; /* Get our list of supported groups */ if (!tls1_get_curvelist(s, 0, &groups, &numgroups) || numgroups == 0) { SSLerr(SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS, ERR_R_INTERNAL_ERROR); return EXT_RETURN_FAIL; } /* Copy group ID if supported */ for (i = 0; i < numgroups; i++, groups += 2) { if (tls_curve_allowed(s, groups, SSL_SECOP_CURVE_SUPPORTED)) { if (first) { /* * Check if the client is already using our preferred group. If * so we don't need to add this extension */ if (s->s3->group_id == GET_GROUP_ID(groups, 0)) return EXT_RETURN_NOT_SENT; /* Add extension header */ if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_groups) /* Sub-packet for supported_groups extension */ || !WPACKET_start_sub_packet_u16(pkt) || !WPACKET_start_sub_packet_u16(pkt)) { SSLerr(SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS, ERR_R_INTERNAL_ERROR); return EXT_RETURN_FAIL; } first = 0; } if (!WPACKET_put_bytes_u16(pkt, GET_GROUP_ID(groups, 0))) { SSLerr(SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS, ERR_R_INTERNAL_ERROR); return EXT_RETURN_FAIL; } } } if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { SSLerr(SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS, ERR_R_INTERNAL_ERROR); return EXT_RETURN_FAIL; } return EXT_RETURN_SENT; }
int tls_construct_ctos_supported_groups(SSL *s, WPACKET *pkt, unsigned int context, X509 *x, size_t chainidx, int *al) { const unsigned char *pcurves = NULL, *pcurvestmp; size_t num_curves = 0, i; if (!use_ecc(s)) return 1; /* * Add TLS extension supported_groups to the ClientHello message */ /* TODO(TLS1.3): Add support for DHE groups */ pcurves = s->ext.supportedgroups; if (!tls1_get_curvelist(s, 0, &pcurves, &num_curves)) { SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, ERR_R_INTERNAL_ERROR); return 0; } pcurvestmp = pcurves; if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_groups) /* Sub-packet for supported_groups extension */ || !WPACKET_start_sub_packet_u16(pkt) || !WPACKET_start_sub_packet_u16(pkt)) { SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, ERR_R_INTERNAL_ERROR); return 0; } /* Copy curve ID if supported */ for (i = 0; i < num_curves; i++, pcurvestmp += 2) { if (tls_curve_allowed(s, pcurvestmp, SSL_SECOP_CURVE_SUPPORTED)) { if (!WPACKET_put_bytes_u8(pkt, pcurvestmp[0]) || !WPACKET_put_bytes_u8(pkt, pcurvestmp[1])) { SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, ERR_R_INTERNAL_ERROR); return 0; } } } if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, ERR_R_INTERNAL_ERROR); return 0; } return 1; }
int tls_construct_ctos_alpn(SSL *s, WPACKET *pkt, int *al) { s->s3->alpn_sent = 0; /* * finish_md_len is non-zero during a renegotiation, so * this avoids sending ALPN during the renegotiation */ if (s->alpn_client_proto_list == NULL || s->s3->tmp.finish_md_len != 0) return 1; if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_application_layer_protocol_negotiation) /* Sub-packet ALPN extension */ || !WPACKET_start_sub_packet_u16(pkt) || !WPACKET_sub_memcpy_u16(pkt, s->alpn_client_proto_list, s->alpn_client_proto_list_len) || !WPACKET_close(pkt)) { SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_ALPN, ERR_R_INTERNAL_ERROR); return 0; } s->s3->alpn_sent = 1; return 1; }
EXT_RETURN tls_construct_stoc_status_request(SSL *s, WPACKET *pkt, unsigned int context, X509 *x, size_t chainidx, int *al) { if (!s->ext.status_expected) return EXT_RETURN_NOT_SENT; if (SSL_IS_TLS13(s) && chainidx != 0) return EXT_RETURN_NOT_SENT; if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_status_request) || !WPACKET_start_sub_packet_u16(pkt)) { SSLerr(SSL_F_TLS_CONSTRUCT_STOC_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); return EXT_RETURN_FAIL; } /* * In TLSv1.3 we include the certificate status itself. In <= TLSv1.2 we * send back an empty extension, with the certificate status appearing as a * separate message */ if ((SSL_IS_TLS13(s) && !tls_construct_cert_status_body(s, pkt)) || !WPACKET_close(pkt)) { SSLerr(SSL_F_TLS_CONSTRUCT_STOC_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); return EXT_RETURN_FAIL; } return EXT_RETURN_SENT; }
EXT_RETURN tls_construct_stoc_ec_pt_formats(SSL *s, WPACKET *pkt, unsigned int context, X509 *x, size_t chainidx, int *al) { unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey; unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth; int using_ecc = ((alg_k & SSL_kECDHE) || (alg_a & SSL_aECDSA)) && (s->session->ext.ecpointformats != NULL); const unsigned char *plist; size_t plistlen; if (!using_ecc) return EXT_RETURN_NOT_SENT; tls1_get_formatlist(s, &plist, &plistlen); if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_ec_point_formats) || !WPACKET_start_sub_packet_u16(pkt) || !WPACKET_sub_memcpy_u8(pkt, plist, plistlen) || !WPACKET_close(pkt)) { SSLerr(SSL_F_TLS_CONSTRUCT_STOC_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR); return EXT_RETURN_FAIL; } return EXT_RETURN_SENT; }
unsigned long ssl3_output_cert_chain(SSL *s, CERT_PKEY *cpk) { WPACKET pkt; if (!WPACKET_init(&pkt, s->init_buf)) { /* Should not happen */ SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN, ERR_R_INTERNAL_ERROR); goto err; } if (!ssl_set_handshake_header2(s, &pkt, SSL3_MT_CERTIFICATE) || !WPACKET_start_sub_packet_u24(&pkt)) { SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN, ERR_R_INTERNAL_ERROR); goto err; } if (!ssl_add_cert_chain(s, &pkt, cpk)) goto err; if (!WPACKET_close(&pkt) || !ssl_close_construct_packet(s, &pkt)) { SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN, ERR_R_INTERNAL_ERROR); goto err; } return 1; err: WPACKET_cleanup(&pkt); return 0; }
int tls_construct_ctos_supported_versions(SSL *s, WPACKET *pkt, unsigned int context, X509 *x, size_t chainidx, int *al) { int currv, min_version, max_version, reason; if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_versions) || !WPACKET_start_sub_packet_u16(pkt) || !WPACKET_start_sub_packet_u8(pkt)) { SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, ERR_R_INTERNAL_ERROR); return 0; } reason = ssl_get_client_min_max_version(s, &min_version, &max_version); if (reason != 0) { SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, reason); return 0; } /* * TODO(TLS1.3): There is some discussion on the TLS list as to wheter * we should include versions <TLS1.2. For the moment we do. To be * reviewed later. */ for (currv = max_version; currv >= min_version; currv--) { /* TODO(TLS1.3): Remove this first if clause prior to release!! */ if (currv == TLS1_3_VERSION) { if (!WPACKET_put_bytes_u16(pkt, TLS1_3_VERSION_DRAFT)) { SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, ERR_R_INTERNAL_ERROR); return 0; } } else if (!WPACKET_put_bytes_u16(pkt, currv)) { SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, ERR_R_INTERNAL_ERROR); return 0; } } if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, ERR_R_INTERNAL_ERROR); return 0; } return 1; }
int WPACKET_sub_allocate_bytes__(WPACKET *pkt, size_t len, unsigned char **allocbytes, size_t lenbytes) { if (!WPACKET_start_sub_packet_len__(pkt, lenbytes) || !WPACKET_allocate_bytes(pkt, len, allocbytes) || !WPACKET_close(pkt)) return 0; return 1; }
int WPACKET_sub_memcpy__(WPACKET *pkt, const void *src, size_t len, size_t lenbytes) { if (!WPACKET_start_sub_packet_len__(pkt, lenbytes) || !WPACKET_memcpy(pkt, src, len) || !WPACKET_close(pkt)) return 0; return 1; }
int tls_construct_stoc_alpn(SSL *s, WPACKET *pkt, int *al) { if (s->s3->alpn_selected == NULL) return 1; if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_application_layer_protocol_negotiation) || !WPACKET_start_sub_packet_u16(pkt) || !WPACKET_start_sub_packet_u16(pkt) || !WPACKET_sub_memcpy_u8(pkt, s->s3->alpn_selected, s->s3->alpn_selected_len) || !WPACKET_close(pkt) || !WPACKET_close(pkt)) { SSLerr(SSL_F_TLS_CONSTRUCT_STOC_ALPN, ERR_R_INTERNAL_ERROR); return 0; } return 1; }
unsigned long ssl3_output_cert_chain(SSL *s, WPACKET *pkt, CERT_PKEY *cpk) { if (!WPACKET_start_sub_packet_u24(pkt) || !ssl_add_cert_chain(s, pkt, cpk) || !WPACKET_close(pkt)) { SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN, ERR_R_INTERNAL_ERROR); return 0; } return 1; }
/* * Add the server's renegotiation binding */ int tls_construct_stoc_renegotiate(SSL *s, WPACKET *pkt, int *al) { if (!s->s3->send_connection_binding) return 1; if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_renegotiate) || !WPACKET_start_sub_packet_u16(pkt) || !WPACKET_start_sub_packet_u8(pkt) || !WPACKET_memcpy(pkt, s->s3->previous_client_finished, s->s3->previous_client_finished_len) || !WPACKET_memcpy(pkt, s->s3->previous_server_finished, s->s3->previous_server_finished_len) || !WPACKET_close(pkt) || !WPACKET_close(pkt)) { SSLerr(SSL_F_TLS_CONSTRUCT_STOC_RENEGOTIATE, ERR_R_INTERNAL_ERROR); return 0; } return 1; }
EXT_RETURN tls_construct_stoc_alpn(SSL *s, WPACKET *pkt, unsigned int context, X509 *x, size_t chainidx, int *al) { if (s->s3->alpn_selected == NULL) return EXT_RETURN_NOT_SENT; if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_application_layer_protocol_negotiation) || !WPACKET_start_sub_packet_u16(pkt) || !WPACKET_start_sub_packet_u16(pkt) || !WPACKET_sub_memcpy_u8(pkt, s->s3->alpn_selected, s->s3->alpn_selected_len) || !WPACKET_close(pkt) || !WPACKET_close(pkt)) { SSLerr(SSL_F_TLS_CONSTRUCT_STOC_ALPN, ERR_R_INTERNAL_ERROR); return EXT_RETURN_FAIL; } return EXT_RETURN_SENT; }
int tls_construct_stoc_key_share(SSL *s, WPACKET *pkt, int *al) { unsigned char *encodedPoint; size_t encoded_pt_len = 0; EVP_PKEY *ckey = s->s3->peer_tmp, *skey = NULL; if (s->hit) return 1; if (ckey == NULL) { SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); return 0; } if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) || !WPACKET_start_sub_packet_u16(pkt) || !WPACKET_put_bytes_u16(pkt, s->s3->group_id)) { SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); return 0; } skey = ssl_generate_pkey(ckey); if (skey == NULL) { SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_MALLOC_FAILURE); return 0; } /* Generate encoding of server key */ encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(skey, &encodedPoint); if (encoded_pt_len == 0) { SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_EC_LIB); EVP_PKEY_free(skey); return 0; } if (!WPACKET_sub_memcpy_u16(pkt, encodedPoint, encoded_pt_len) || !WPACKET_close(pkt)) { SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); EVP_PKEY_free(skey); OPENSSL_free(encodedPoint); return 0; } OPENSSL_free(encodedPoint); /* This causes the crypto state to be updated based on the derived keys */ s->s3->tmp.pkey = skey; if (ssl_derive(s, skey, ckey, 1) == 0) { SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR); return 0; } return 1; }
int tls_construct_ctos_srp(SSL *s, WPACKET *pkt, int *al) { /* Add SRP username if there is one */ if (s->srp_ctx.login == NULL) return 1; if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_srp) /* Sub-packet for SRP extension */ || !WPACKET_start_sub_packet_u16(pkt) || !WPACKET_start_sub_packet_u8(pkt) /* login must not be zero...internal error if so */ || !WPACKET_set_flags(pkt, WPACKET_FLAGS_NON_ZERO_LENGTH) || !WPACKET_memcpy(pkt, s->srp_ctx.login, strlen(s->srp_ctx.login)) || !WPACKET_close(pkt) || !WPACKET_close(pkt)) { SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SRP, ERR_R_INTERNAL_ERROR); return 0; } return 1; }
int tls_construct_ctos_server_name(SSL *s, WPACKET *pkt, int *al) { if (s->tlsext_hostname == NULL) return 1; /* Add TLS extension servername to the Client Hello message */ if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_server_name) /* Sub-packet for server_name extension */ || !WPACKET_start_sub_packet_u16(pkt) /* Sub-packet for servername list (always 1 hostname)*/ || !WPACKET_start_sub_packet_u16(pkt) || !WPACKET_put_bytes_u8(pkt, TLSEXT_NAMETYPE_host_name) || !WPACKET_sub_memcpy_u16(pkt, s->tlsext_hostname, strlen(s->tlsext_hostname)) || !WPACKET_close(pkt) || !WPACKET_close(pkt)) { SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SERVER_NAME, ERR_R_INTERNAL_ERROR); return 0; } return 1; }
int tls_close_construct_packet(SSL *s, WPACKET *pkt, int htype) { size_t msglen; if ((htype != SSL3_MT_CHANGE_CIPHER_SPEC && !WPACKET_close(pkt)) || !WPACKET_get_length(pkt, &msglen) || msglen > INT_MAX) return 0; s->init_num = (int)msglen; s->init_off = 0; return 1; }
/* * Add the server's renegotiation binding */ EXT_RETURN tls_construct_stoc_renegotiate(SSL *s, WPACKET *pkt, unsigned int context, X509 *x, size_t chainidx, int *al) { if (!s->s3->send_connection_binding) return EXT_RETURN_NOT_SENT; if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_renegotiate) || !WPACKET_start_sub_packet_u16(pkt) || !WPACKET_start_sub_packet_u8(pkt) || !WPACKET_memcpy(pkt, s->s3->previous_client_finished, s->s3->previous_client_finished_len) || !WPACKET_memcpy(pkt, s->s3->previous_server_finished, s->s3->previous_server_finished_len) || !WPACKET_close(pkt) || !WPACKET_close(pkt)) { SSLerr(SSL_F_TLS_CONSTRUCT_STOC_RENEGOTIATE, ERR_R_INTERNAL_ERROR); return EXT_RETURN_FAIL; } return EXT_RETURN_SENT; }
int tls_construct_ctos_use_srtp(SSL *s, WPACKET *pkt, unsigned int context, X509 *x, size_t chainidx, int *al) { STACK_OF(SRTP_PROTECTION_PROFILE) *clnt = SSL_get_srtp_profiles(s); int i, end; if (clnt == NULL) return 1; if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp) /* Sub-packet for SRTP extension */ || !WPACKET_start_sub_packet_u16(pkt) /* Sub-packet for the protection profile list */ || !WPACKET_start_sub_packet_u16(pkt)) { SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR); return 0; } end = sk_SRTP_PROTECTION_PROFILE_num(clnt); for (i = 0; i < end; i++) { const SRTP_PROTECTION_PROFILE *prof = sk_SRTP_PROTECTION_PROFILE_value(clnt, i); if (prof == NULL || !WPACKET_put_bytes_u16(pkt, prof->id)) { SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR); return 0; } } if (!WPACKET_close(pkt) /* Add an empty use_mki value */ || !WPACKET_put_bytes_u8(pkt, 0) || !WPACKET_close(pkt)) { SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR); return 0; } return 1; }
/* * Given a |secret|; a |label| of length |labellen|; and a |hash| of the * handshake messages, derive a new secret |outlen| bytes long and store it in * the location pointed to be |out|. The |hash| value may be NULL. Returns 1 on * success 0 on failure. */ static int tls13_hkdf_expand(SSL *s, const unsigned char *secret, const unsigned char *label, size_t labellen, const unsigned char *hash, unsigned char *out, size_t outlen) { const unsigned char label_prefix[] = "TLS 1.3, "; const EVP_MD *md = ssl_handshake_md(s); EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_HKDF, NULL); int ret; size_t hkdflabellen; size_t hashlen; /* * 2 bytes for length of whole HkdfLabel + 1 byte for length of combined * prefix and label + bytes for the label itself + bytes for the hash */ unsigned char hkdflabel[sizeof(uint16_t) + sizeof(uint8_t) + + sizeof(label_prefix) + TLS13_MAX_LABEL_LEN + EVP_MAX_MD_SIZE]; WPACKET pkt; if (pctx == NULL) return 0; hashlen = EVP_MD_size(md); if (!WPACKET_init_static_len(&pkt, hkdflabel, sizeof(hkdflabel), 0) || !WPACKET_put_bytes_u16(&pkt, outlen) || !WPACKET_start_sub_packet_u8(&pkt) || !WPACKET_memcpy(&pkt, label_prefix, sizeof(label_prefix) - 1) || !WPACKET_memcpy(&pkt, label, labellen) || !WPACKET_close(&pkt) || !WPACKET_sub_memcpy_u8(&pkt, hash, (hash == NULL) ? 0 : hashlen) || !WPACKET_get_total_written(&pkt, &hkdflabellen) || !WPACKET_finish(&pkt)) { WPACKET_cleanup(&pkt); return 0; } ret = EVP_PKEY_derive_init(pctx) <= 0 || EVP_PKEY_CTX_hkdf_mode(pctx, EVP_PKEY_HKDEF_MODE_EXPAND_ONLY) <= 0 || EVP_PKEY_CTX_set_hkdf_md(pctx, md) <= 0 || EVP_PKEY_CTX_set1_hkdf_key(pctx, secret, hashlen) <= 0 || EVP_PKEY_CTX_add1_hkdf_info(pctx, hkdflabel, hkdflabellen) <= 0 || EVP_PKEY_derive(pctx, out, &outlen) <= 0; EVP_PKEY_CTX_free(pctx); return ret == 0; }
int tls_close_construct_packet(SSL *s, WPACKET *pkt) { size_t msglen; if (!WPACKET_close(pkt) || !WPACKET_get_length(pkt, &msglen) || msglen > INT_MAX || !WPACKET_finish(pkt)) return 0; s->init_num = (int)msglen; s->init_off = 0; return 1; }
int tls_construct_ctos_sig_algs(SSL *s, WPACKET *pkt, int *al) { size_t salglen; const unsigned char *salg; if (!SSL_CLIENT_USE_SIGALGS(s)) return 1; salglen = tls12_get_psigalgs(s, &salg); if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signature_algorithms) /* Sub-packet for sig-algs extension */ || !WPACKET_start_sub_packet_u16(pkt) /* Sub-packet for the actual list */ || !WPACKET_start_sub_packet_u16(pkt) || !tls12_copy_sigalgs(s, pkt, salg, salglen) || !WPACKET_close(pkt) || !WPACKET_close(pkt)) { SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SIG_ALGS, ERR_R_INTERNAL_ERROR); return 0; } return 1; }
/* * Construct a psk_kex_modes extension. We only have two modes we know about * at this stage, so we send both. */ int tls_construct_ctos_psk_kex_modes(SSL *s, WPACKET *pkt, unsigned int context, X509 *x, size_t chainidx, int *al) { #ifndef OPENSSL_NO_TLS1_3 /* * TODO(TLS1.3): Do we want this list to be configurable? For now we always * just send both supported modes */ if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk_kex_modes) || !WPACKET_start_sub_packet_u16(pkt) || !WPACKET_start_sub_packet_u8(pkt) || !WPACKET_put_bytes_u8(pkt, TLSEXT_KEX_MODE_KE_DHE) || !WPACKET_put_bytes_u8(pkt, TLSEXT_KEX_MODE_KE) || !WPACKET_close(pkt) || !WPACKET_close(pkt)) { SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK_KEX_MODES, ERR_R_INTERNAL_ERROR); return 0; } s->ext.psk_kex_mode = TLSEXT_KEX_MODE_FLAG_KE | TLSEXT_KEX_MODE_FLAG_KE_DHE; #endif return 1; }
EXT_RETURN tls_construct_stoc_psk(SSL *s, WPACKET *pkt, unsigned int context, X509 *x, size_t chainidx, int *al) { if (!s->hit) return EXT_RETURN_NOT_SENT; if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk) || !WPACKET_start_sub_packet_u16(pkt) || !WPACKET_put_bytes_u16(pkt, s->session->ext.tick_identity) || !WPACKET_close(pkt)) { SSLerr(SSL_F_TLS_CONSTRUCT_STOC_PSK, ERR_R_INTERNAL_ERROR); return EXT_RETURN_FAIL; } return EXT_RETURN_SENT; }
int tls_construct_stoc_use_srtp(SSL *s, WPACKET *pkt, int *al) { if (s->srtp_profile == NULL) return 1; if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp) || !WPACKET_start_sub_packet_u16(pkt) || !WPACKET_put_bytes_u16(pkt, 2) || !WPACKET_put_bytes_u16(pkt, s->srtp_profile->id) || !WPACKET_put_bytes_u8(pkt, 0) || !WPACKET_close(pkt)) { SSLerr(SSL_F_TLS_CONSTRUCT_STOC_USE_SRTP, ERR_R_INTERNAL_ERROR); return 0; } return 1; }
int tls_construct_ctos_renegotiate(SSL *s, WPACKET *pkt, int *al) { /* Add RI if renegotiating */ if (!s->renegotiate) return 1; if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_renegotiate) || !WPACKET_start_sub_packet_u16(pkt) || !WPACKET_sub_memcpy_u8(pkt, s->s3->previous_client_finished, s->s3->previous_client_finished_len) || !WPACKET_close(pkt)) { SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_RENEGOTIATE, ERR_R_INTERNAL_ERROR); return 0; } return 1; }
EXT_RETURN tls_construct_stoc_use_srtp(SSL *s, WPACKET *pkt, unsigned int context, X509 *x, size_t chainidx, int *al) { if (s->srtp_profile == NULL) return EXT_RETURN_NOT_SENT; if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp) || !WPACKET_start_sub_packet_u16(pkt) || !WPACKET_put_bytes_u16(pkt, 2) || !WPACKET_put_bytes_u16(pkt, s->srtp_profile->id) || !WPACKET_put_bytes_u8(pkt, 0) || !WPACKET_close(pkt)) { SSLerr(SSL_F_TLS_CONSTRUCT_STOC_USE_SRTP, ERR_R_INTERNAL_ERROR); return EXT_RETURN_FAIL; } return EXT_RETURN_SENT; }
int tls_construct_ctos_alpn(SSL *s, WPACKET *pkt, unsigned int context, X509 *x, size_t chainidx, int *al) { s->s3->alpn_sent = 0; if (s->ext.alpn == NULL || !SSL_IS_FIRST_HANDSHAKE(s)) return 1; if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_application_layer_protocol_negotiation) /* Sub-packet ALPN extension */ || !WPACKET_start_sub_packet_u16(pkt) || !WPACKET_sub_memcpy_u16(pkt, s->ext.alpn, s->ext.alpn_len) || !WPACKET_close(pkt)) { SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_ALPN, ERR_R_INTERNAL_ERROR); return 0; } s->s3->alpn_sent = 1; return 1; }