/* $OpenBSD: ssl_both.c,v 1.6 2017/02/07 02:08:38 beck Exp $ */ /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */ /* ==================================================================== * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. All advertising materials mentioning features or use of this * software must display the following acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" * * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to * endorse or promote products derived from this software without * prior written permission. For written permission, please contact * openssl-core@openssl.org. * * 5. Products derived from this software may not be called "OpenSSL" * nor may "OpenSSL" appear in their names without prior written * permission of the OpenSSL Project. * * 6. Redistributions of any form whatsoever must retain the following * acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit (http://www.openssl.org/)" * * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * ==================================================================== * * This product includes cryptographic software written by Eric Young * (eay@cryptsoft.com). This product includes software written by Tim * Hudson (tjh@cryptsoft.com). * */ /* ==================================================================== * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. * ECC cipher suite support in OpenSSL originally developed by * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project. */ #include #include #include #include "ssl_locl.h" #include #include #include #include #include "bytestring.h" /* * Send s->internal->init_buf in records of type 'type' (SSL3_RT_HANDSHAKE or * SSL3_RT_CHANGE_CIPHER_SPEC). */ int ssl3_do_write(SSL *s, int type) { int ret; ret = ssl3_write_bytes(s, type, &s->internal->init_buf->data[s->internal->init_off], s->internal->init_num); if (ret < 0) return (-1); if (type == SSL3_RT_HANDSHAKE) /* * Should not be done for 'Hello Request's, but in that case * we'll ignore the result anyway. */ tls1_finish_mac(s, (unsigned char *)&s->internal->init_buf->data[s->internal->init_off], ret); if (ret == s->internal->init_num) { if (s->internal->msg_callback) s->internal->msg_callback(1, s->version, type, s->internal->init_buf->data, (size_t)(s->internal->init_off + s->internal->init_num), s, s->internal->msg_callback_arg); return (1); } s->internal->init_off += ret; s->internal->init_num -= ret; return (0); } int ssl3_send_finished(SSL *s, int a, int b, const char *sender, int slen) { unsigned char *p; int md_len; if (s->internal->state == a) { md_len = TLS1_FINISH_MAC_LENGTH; OPENSSL_assert(md_len <= EVP_MAX_MD_SIZE); if (tls1_final_finish_mac(s, sender, slen, S3I(s)->tmp.finish_md) != md_len) return (0); S3I(s)->tmp.finish_md_len = md_len; /* Copy finished so we can use it for renegotiation checks. */ if (s->internal->type == SSL_ST_CONNECT) { memcpy(S3I(s)->previous_client_finished, S3I(s)->tmp.finish_md, md_len); S3I(s)->previous_client_finished_len = md_len; } else { memcpy(S3I(s)->previous_server_finished, S3I(s)->tmp.finish_md, md_len); S3I(s)->previous_server_finished_len = md_len; } p = ssl3_handshake_msg_start(s, SSL3_MT_FINISHED); memcpy(p, S3I(s)->tmp.finish_md, md_len); ssl3_handshake_msg_finish(s, md_len); s->internal->state = b; } return (ssl3_handshake_write(s)); } /* * ssl3_take_mac calculates the Finished MAC for the handshakes messages seen * so far. */ static void ssl3_take_mac(SSL *s) { const char *sender; int slen; /* * If no new cipher setup return immediately: other functions will * set the appropriate error. */ if (S3I(s)->tmp.new_cipher == NULL) return; if (s->internal->state & SSL_ST_CONNECT) { sender = TLS_MD_SERVER_FINISH_CONST; slen = TLS_MD_SERVER_FINISH_CONST_SIZE; } else { sender = TLS_MD_CLIENT_FINISH_CONST; slen = TLS_MD_CLIENT_FINISH_CONST_SIZE; } S3I(s)->tmp.peer_finish_md_len = tls1_final_finish_mac(s, sender, slen, S3I(s)->tmp.peer_finish_md); } int ssl3_get_finished(SSL *s, int a, int b) { int al, ok, md_len; long n; CBS cbs; /* should actually be 36+4 :-) */ n = s->method->internal->ssl_get_message(s, a, b, SSL3_MT_FINISHED, 64, &ok); if (!ok) return ((int)n); /* If this occurs, we have missed a message */ if (!S3I(s)->change_cipher_spec) { al = SSL_AD_UNEXPECTED_MESSAGE; SSLerror(s, SSL_R_GOT_A_FIN_BEFORE_A_CCS); goto f_err; } S3I(s)->change_cipher_spec = 0; md_len = TLS1_FINISH_MAC_LENGTH; if (n < 0) { al = SSL_AD_DECODE_ERROR; SSLerror(s, SSL_R_BAD_DIGEST_LENGTH); goto f_err; } CBS_init(&cbs, s->internal->init_msg, n); if (S3I(s)->tmp.peer_finish_md_len != md_len || CBS_len(&cbs) != md_len) { al = SSL_AD_DECODE_ERROR; SSLerror(s, SSL_R_BAD_DIGEST_LENGTH); goto f_err; } if (!CBS_mem_equal(&cbs, S3I(s)->tmp.peer_finish_md, CBS_len(&cbs))) { al = SSL_AD_DECRYPT_ERROR; SSLerror(s, SSL_R_DIGEST_CHECK_FAILED); goto f_err; } /* Copy finished so we can use it for renegotiation checks. */ OPENSSL_assert(md_len <= EVP_MAX_MD_SIZE); if (s->internal->type == SSL_ST_ACCEPT) { memcpy(S3I(s)->previous_client_finished, S3I(s)->tmp.peer_finish_md, md_len); S3I(s)->previous_client_finished_len = md_len; } else { memcpy(S3I(s)->previous_server_finished, S3I(s)->tmp.peer_finish_md, md_len); S3I(s)->previous_server_finished_len = md_len; } return (1); f_err: ssl3_send_alert(s, SSL3_AL_FATAL, al); return (0); } /* for these 2 messages, we need to * ssl->enc_read_ctx re-init * ssl->s3->internal->read_sequence zero * ssl->s3->internal->read_mac_secret re-init * ssl->session->read_sym_enc assign * ssl->session->read_hash assign */ int ssl3_send_change_cipher_spec(SSL *s, int a, int b) { unsigned char *p; if (s->internal->state == a) { p = (unsigned char *)s->internal->init_buf->data; *p = SSL3_MT_CCS; s->internal->init_num = 1; s->internal->init_off = 0; s->internal->state = b; } /* SSL3_ST_CW_CHANGE_B */ return (ssl3_do_write(s, SSL3_RT_CHANGE_CIPHER_SPEC)); } static int ssl3_add_cert(CBB *cbb, X509 *x) { unsigned char *data; int cert_len; int ret = 0; CBB cert; if ((cert_len = i2d_X509(x, NULL)) < 0) goto err; if (!CBB_add_u24_length_prefixed(cbb, &cert)) goto err; if (!CBB_add_space(&cert, &data, cert_len)) goto err; if (i2d_X509(x, &data) < 0) goto err; if (!CBB_flush(cbb)) goto err; ret = 1; err: return (ret); } int ssl3_output_cert_chain(SSL *s, CBB *cbb, X509 *x) { int no_chain = 0; CBB cert_list; int ret = 0; int i; if (!CBB_add_u24_length_prefixed(cbb, &cert_list)) goto err; if ((s->internal->mode & SSL_MODE_NO_AUTO_CHAIN) || s->ctx->extra_certs) no_chain = 1; /* TLSv1 sends a chain with nothing in it, instead of an alert. */ if (x != NULL) { if (no_chain) { if (!ssl3_add_cert(&cert_list, x)) goto err; } else { X509_STORE_CTX xs_ctx; if (!X509_STORE_CTX_init(&xs_ctx, s->ctx->cert_store, x, NULL)) { SSLerror(s, ERR_R_X509_LIB); goto err; } X509_verify_cert(&xs_ctx); /* Don't leave errors in the queue. */ ERR_clear_error(); for (i = 0; i < sk_X509_num(xs_ctx.chain); i++) { x = sk_X509_value(xs_ctx.chain, i); if (!ssl3_add_cert(&cert_list, x)) { X509_STORE_CTX_cleanup(&xs_ctx); goto err; } } X509_STORE_CTX_cleanup(&xs_ctx); } } /* Thawte special :-) */ for (i = 0; i < sk_X509_num(s->ctx->extra_certs); i++) { x = sk_X509_value(s->ctx->extra_certs, i); if (!ssl3_add_cert(&cert_list, x)) goto err; } if (!CBB_flush(cbb)) goto err; ret = 1; err: return (ret); } /* * Obtain handshake message of message type 'mt' (any if mt == -1), * maximum acceptable body length 'max'. * The first four bytes (msg_type and length) are read in state 'st1', * the body is read in state 'stn'. */ long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok) { unsigned char *p; uint32_t l; long n; int i, al; CBS cbs; uint8_t u8; if (S3I(s)->tmp.reuse_message) { S3I(s)->tmp.reuse_message = 0; if ((mt >= 0) && (S3I(s)->tmp.message_type != mt)) { al = SSL_AD_UNEXPECTED_MESSAGE; SSLerror(s, SSL_R_UNEXPECTED_MESSAGE); goto f_err; } *ok = 1; s->internal->init_msg = s->internal->init_buf->data + 4; s->internal->init_num = (int)S3I(s)->tmp.message_size; return s->internal->init_num; } p = (unsigned char *)s->internal->init_buf->data; /* s->internal->init_num < 4 */ if (s->internal->state == st1) { int skip_message; do { while (s->internal->init_num < 4) { i = s->method->internal->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, &p[s->internal->init_num], 4 - s->internal->init_num, 0); if (i <= 0) { s->internal->rwstate = SSL_READING; *ok = 0; return i; } s->internal->init_num += i; } skip_message = 0; if (!s->server && p[0] == SSL3_MT_HELLO_REQUEST) { /* * The server may always send 'Hello Request' * messages -- we are doing a handshake anyway * now, so ignore them if their format is * correct. Does not count for 'Finished' MAC. */ if (p[1] == 0 && p[2] == 0 &&p[3] == 0) { s->internal->init_num = 0; skip_message = 1; if (s->internal->msg_callback) s->internal->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, p, 4, s, s->internal->msg_callback_arg); } } } while (skip_message); /* s->internal->init_num == 4 */ if ((mt >= 0) && (*p != mt)) { al = SSL_AD_UNEXPECTED_MESSAGE; SSLerror(s, SSL_R_UNEXPECTED_MESSAGE); goto f_err; } CBS_init(&cbs, p, 4); if (!CBS_get_u8(&cbs, &u8) || !CBS_get_u24(&cbs, &l)) { SSLerror(s, ERR_R_BUF_LIB); goto err; } S3I(s)->tmp.message_type = u8; if (l > (unsigned long)max) { al = SSL_AD_ILLEGAL_PARAMETER; SSLerror(s, SSL_R_EXCESSIVE_MESSAGE_SIZE); goto f_err; } if (l && !BUF_MEM_grow_clean(s->internal->init_buf, l + 4)) { SSLerror(s, ERR_R_BUF_LIB); goto err; } S3I(s)->tmp.message_size = l; s->internal->state = stn; s->internal->init_msg = s->internal->init_buf->data + 4; s->internal->init_num = 0; } /* next state (stn) */ p = s->internal->init_msg; n = S3I(s)->tmp.message_size - s->internal->init_num; while (n > 0) { i = s->method->internal->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, &p[s->internal->init_num], n, 0); if (i <= 0) { s->internal->rwstate = SSL_READING; *ok = 0; return i; } s->internal->init_num += i; n -= i; } /* If receiving Finished, record MAC of prior handshake messages for * Finished verification. */ if (*s->internal->init_buf->data == SSL3_MT_FINISHED) ssl3_take_mac(s); /* Feed this message into MAC computation. */ if (s->internal->mac_packet) { tls1_finish_mac(s, (unsigned char *)s->internal->init_buf->data, s->internal->init_num + 4); if (s->internal->msg_callback) s->internal->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->internal->init_buf->data, (size_t)s->internal->init_num + 4, s, s->internal->msg_callback_arg); } *ok = 1; return (s->internal->init_num); f_err: ssl3_send_alert(s, SSL3_AL_FATAL, al); err: *ok = 0; return (-1); } int ssl_cert_type(X509 *x, EVP_PKEY *pkey) { EVP_PKEY *pk; int ret = -1, i; if (pkey == NULL) pk = X509_get_pubkey(x); else pk = pkey; if (pk == NULL) goto err; i = pk->type; if (i == EVP_PKEY_RSA) { ret = SSL_PKEY_RSA_ENC; } else if (i == EVP_PKEY_DSA) { ret = SSL_PKEY_DSA_SIGN; } else if (i == EVP_PKEY_EC) { ret = SSL_PKEY_ECC; } else if (i == NID_id_GostR3410_2001 || i == NID_id_GostR3410_2001_cc) { ret = SSL_PKEY_GOST01; } err: if (!pkey) EVP_PKEY_free(pk); return (ret); } int ssl_verify_alarm_type(long type) { int al; switch (type) { case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT: case X509_V_ERR_UNABLE_TO_GET_CRL: case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER: al = SSL_AD_UNKNOWN_CA; break; case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE: case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE: case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY: case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD: case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD: case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD: case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD: case X509_V_ERR_CERT_NOT_YET_VALID: case X509_V_ERR_CRL_NOT_YET_VALID: case X509_V_ERR_CERT_UNTRUSTED: case X509_V_ERR_CERT_REJECTED: al = SSL_AD_BAD_CERTIFICATE; break; case X509_V_ERR_CERT_SIGNATURE_FAILURE: case X509_V_ERR_CRL_SIGNATURE_FAILURE: al = SSL_AD_DECRYPT_ERROR; break; case X509_V_ERR_CERT_HAS_EXPIRED: case X509_V_ERR_CRL_HAS_EXPIRED: al = SSL_AD_CERTIFICATE_EXPIRED; break; case X509_V_ERR_CERT_REVOKED: al = SSL_AD_CERTIFICATE_REVOKED; break; case X509_V_ERR_OUT_OF_MEM: al = SSL_AD_INTERNAL_ERROR; break; case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT: case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN: case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY: case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE: case X509_V_ERR_CERT_CHAIN_TOO_LONG: case X509_V_ERR_PATH_LENGTH_EXCEEDED: case X509_V_ERR_INVALID_CA: al = SSL_AD_UNKNOWN_CA; break; case X509_V_ERR_APPLICATION_VERIFICATION: al = SSL_AD_HANDSHAKE_FAILURE; break; case X509_V_ERR_INVALID_PURPOSE: al = SSL_AD_UNSUPPORTED_CERTIFICATE; break; default: al = SSL_AD_CERTIFICATE_UNKNOWN; break; } return (al); } int ssl3_setup_init_buffer(SSL *s) { BUF_MEM *buf = NULL; if (s->internal->init_buf != NULL) return (1); if ((buf = BUF_MEM_new()) == NULL) goto err; if (!BUF_MEM_grow(buf, SSL3_RT_MAX_PLAIN_LENGTH)) goto err; s->internal->init_buf = buf; return (1); err: BUF_MEM_free(buf); return (0); } int ssl3_setup_read_buffer(SSL *s) { unsigned char *p; size_t len, align, headerlen; if (SSL_IS_DTLS(s)) headerlen = DTLS1_RT_HEADER_LENGTH; else headerlen = SSL3_RT_HEADER_LENGTH; align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1); if (s->s3->rbuf.buf == NULL) { len = SSL3_RT_MAX_PLAIN_LENGTH + SSL3_RT_MAX_ENCRYPTED_OVERHEAD + headerlen + align; if ((p = malloc(len)) == NULL) goto err; s->s3->rbuf.buf = p; s->s3->rbuf.len = len; } s->internal->packet = &(s->s3->rbuf.buf[0]); return 1; err: SSLerror(s, ERR_R_MALLOC_FAILURE); return 0; } int ssl3_setup_write_buffer(SSL *s) { unsigned char *p; size_t len, align, headerlen; if (SSL_IS_DTLS(s)) headerlen = DTLS1_RT_HEADER_LENGTH + 1; else headerlen = SSL3_RT_HEADER_LENGTH; align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1); if (s->s3->wbuf.buf == NULL) { len = s->max_send_fragment + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD + headerlen + align; if (!(s->internal->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)) len += headerlen + align + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD; if ((p = malloc(len)) == NULL) goto err; s->s3->wbuf.buf = p; s->s3->wbuf.len = len; } return 1; err: SSLerror(s, ERR_R_MALLOC_FAILURE); return 0; } int ssl3_setup_buffers(SSL *s) { if (!ssl3_setup_read_buffer(s)) return 0; if (!ssl3_setup_write_buffer(s)) return 0; return 1; } int ssl3_release_write_buffer(SSL *s) { free(s->s3->wbuf.buf); s->s3->wbuf.buf = NULL; return 1; } int ssl3_release_read_buffer(SSL *s) { free(s->s3->rbuf.buf); s->s3->rbuf.buf = NULL; return 1; }