/* $OpenBSD: s3_both.c,v 1.31 2014/10/18 16:13:16 jsing 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 /* send s->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->init_buf->data[s->init_off], s->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 */ ssl3_finish_mac(s,(unsigned char *)&s->init_buf->data[s->init_off], ret); if (ret == s->init_num) { if (s->msg_callback) s->msg_callback(1, s->version, type, s->init_buf->data, (size_t)(s->init_off + s->init_num), s, s->msg_callback_arg); return (1); } s->init_off += ret; s->init_num -= ret; return (0); } int ssl3_send_finished(SSL *s, int a, int b, const char *sender, int slen) { unsigned char *p, *d; unsigned long l; int md_len; if (s->state == a) { d = (unsigned char *)s->init_buf->data; p = &(d[4]); md_len = s->method->ssl3_enc->finish_mac_length; if (s->method->ssl3_enc->final_finish_mac(s, sender, slen, s->s3->tmp.finish_md) != md_len) return (0); s->s3->tmp.finish_md_len = md_len; memcpy(p, s->s3->tmp.finish_md, md_len); p += md_len; l = md_len; /* Copy finished so we can use it for renegotiation checks. */ OPENSSL_assert(md_len <= EVP_MAX_MD_SIZE); if (s->type == SSL_ST_CONNECT) { memcpy(s->s3->previous_client_finished, s->s3->tmp.finish_md, md_len); s->s3->previous_client_finished_len = md_len; } else { memcpy(s->s3->previous_server_finished, s->s3->tmp.finish_md, md_len); s->s3->previous_server_finished_len = md_len; } *(d++) = SSL3_MT_FINISHED; l2n3(l, d); s->init_num = (int)l + 4; s->init_off = 0; s->state = b; } /* SSL3_ST_SEND_xxxxxx_HELLO_B */ return (ssl3_do_write(s, SSL3_RT_HANDSHAKE)); } #ifndef OPENSSL_NO_NEXTPROTONEG /* ssl3_take_mac calculates the Finished MAC for the handshakes messages seen to 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 (s->s3->tmp.new_cipher == NULL) return; if (s->state & SSL_ST_CONNECT) { sender = s->method->ssl3_enc->server_finished_label; slen = s->method->ssl3_enc->server_finished_label_len; } else { sender = s->method->ssl3_enc->client_finished_label; slen = s->method->ssl3_enc->client_finished_label_len; } s->s3->tmp.peer_finish_md_len = s->method->ssl3_enc->final_finish_mac(s, sender, slen, s->s3->tmp.peer_finish_md); } #endif int ssl3_get_finished(SSL *s, int a, int b) { int al, ok, md_len; long n; unsigned char *p; #ifdef OPENSSL_NO_NEXTPROTONEG /* the mac has already been generated when we received the * change cipher spec message and is in s->s3->tmp.peer_finish_md. */ #endif n = s->method->ssl_get_message(s, a, b, SSL3_MT_FINISHED, 64, /* should actually be 36+4 :-) */ &ok); if (!ok) return ((int)n); /* If this occurs, we have missed a message */ if (!s->s3->change_cipher_spec) { al = SSL_AD_UNEXPECTED_MESSAGE; SSLerr(SSL_F_SSL3_GET_FINISHED, SSL_R_GOT_A_FIN_BEFORE_A_CCS); goto f_err; } s->s3->change_cipher_spec = 0; md_len = s->method->ssl3_enc->finish_mac_length; p = (unsigned char *)s->init_msg; if (s->s3->tmp.peer_finish_md_len != md_len || n != md_len) { al = SSL_AD_DECODE_ERROR; SSLerr(SSL_F_SSL3_GET_FINISHED, SSL_R_BAD_DIGEST_LENGTH); goto f_err; } if (timingsafe_memcmp(p, s->s3->tmp.peer_finish_md, md_len) != 0) { al = SSL_AD_DECRYPT_ERROR; SSLerr(SSL_F_SSL3_GET_FINISHED, 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->type == SSL_ST_ACCEPT) { memcpy(s->s3->previous_client_finished, s->s3->tmp.peer_finish_md, md_len); s->s3->previous_client_finished_len = md_len; } else { memcpy(s->s3->previous_server_finished, s->s3->tmp.peer_finish_md, md_len); s->s3->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->read_sequence zero * ssl->s3->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->state == a) { p = (unsigned char *)s->init_buf->data; *p = SSL3_MT_CCS; s->init_num = 1; s->init_off = 0; s->state = b; } /* SSL3_ST_CW_CHANGE_B */ return (ssl3_do_write(s, SSL3_RT_CHANGE_CIPHER_SPEC)); } static int ssl3_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x) { int n; unsigned char *p; n = i2d_X509(x, NULL); if (!BUF_MEM_grow_clean(buf, n + (*l) + 3)) { SSLerr(SSL_F_SSL3_ADD_CERT_TO_BUF, ERR_R_BUF_LIB); return (-1); } p = (unsigned char *)&(buf->data[*l]); l2n3(n, p); i2d_X509(x, &p); *l += n + 3; return (0); } unsigned long ssl3_output_cert_chain(SSL *s, X509 *x) { unsigned char *p; int i; unsigned long l = 7; BUF_MEM *buf; int no_chain; if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || s->ctx->extra_certs) no_chain = 1; else no_chain = 0; /* TLSv1 sends a chain with nothing in it, instead of an alert */ buf = s->init_buf; if (!BUF_MEM_grow_clean(buf, 10)) { SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN, ERR_R_BUF_LIB); return (0); } if (x != NULL) { if (no_chain) { if (ssl3_add_cert_to_buf(buf, &l, x)) return (0); } else { X509_STORE_CTX xs_ctx; if (!X509_STORE_CTX_init(&xs_ctx, s->ctx->cert_store, x, NULL)) { SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN, ERR_R_X509_LIB); return (0); } 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_to_buf(buf, &l, x)) { X509_STORE_CTX_cleanup(&xs_ctx); return 0; } } 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_to_buf(buf, &l, x)) return (0); } l -= 7; p = (unsigned char *)&(buf->data[4]); l2n3(l, p); l += 3; p = (unsigned char *)&(buf->data[0]); *(p++) = SSL3_MT_CERTIFICATE; l2n3(l, p); l += 4; return (l); } /* 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; unsigned long l; long n; int i, al; if (s->s3->tmp.reuse_message) { s->s3->tmp.reuse_message = 0; if ((mt >= 0) && (s->s3->tmp.message_type != mt)) { al = SSL_AD_UNEXPECTED_MESSAGE; SSLerr(SSL_F_SSL3_GET_MESSAGE, SSL_R_UNEXPECTED_MESSAGE); goto f_err; } *ok = 1; s->init_msg = s->init_buf->data + 4; s->init_num = (int)s->s3->tmp.message_size; return s->init_num; } p = (unsigned char *)s->init_buf->data; if (s->state == st1) /* s->init_num < 4 */ { int skip_message; do { while (s->init_num < 4) { i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, &p[s->init_num], 4 - s->init_num, 0); if (i <= 0) { s->rwstate = SSL_READING; *ok = 0; return i; } s->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->init_num = 0; skip_message = 1; if (s->msg_callback) s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, p, 4, s, s->msg_callback_arg); } } } while (skip_message); /* s->init_num == 4 */ if ((mt >= 0) && (*p != mt)) { al = SSL_AD_UNEXPECTED_MESSAGE; SSLerr(SSL_F_SSL3_GET_MESSAGE, SSL_R_UNEXPECTED_MESSAGE); goto f_err; } if ((mt < 0) && (*p == SSL3_MT_CLIENT_HELLO) && (st1 == SSL3_ST_SR_CERT_A) && (stn == SSL3_ST_SR_CERT_B)) { /* At this point we have got an MS SGC second client * hello (maybe we should always allow the client to * start a new handshake?). We need to restart the mac. * Don't increment {num,total}_renegotiations because * we have not completed the handshake. */ ssl3_init_finished_mac(s); } s->s3->tmp.message_type= *(p++); n2l3(p, l); if (l > (unsigned long)max) { al = SSL_AD_ILLEGAL_PARAMETER; SSLerr(SSL_F_SSL3_GET_MESSAGE, SSL_R_EXCESSIVE_MESSAGE_SIZE); goto f_err; } if (l && !BUF_MEM_grow_clean(s->init_buf, l + 4)) { SSLerr(SSL_F_SSL3_GET_MESSAGE, ERR_R_BUF_LIB); goto err; } s->s3->tmp.message_size = l; s->state = stn; s->init_msg = s->init_buf->data + 4; s->init_num = 0; } /* next state (stn) */ p = s->init_msg; n = s->s3->tmp.message_size - s->init_num; while (n > 0) { i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, &p[s->init_num], n, 0); if (i <= 0) { s->rwstate = SSL_READING; *ok = 0; return i; } s->init_num += i; n -= i; } #ifndef OPENSSL_NO_NEXTPROTONEG /* If receiving Finished, record MAC of prior handshake messages for * Finished verification. */ if (*s->init_buf->data == SSL3_MT_FINISHED) ssl3_take_mac(s); #endif /* Feed this message into MAC computation. */ ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num + 4); if (s->msg_callback) s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data, (size_t)s->init_num + 4, s, s->msg_callback_arg); *ok = 1; return s->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_94 || i == NID_id_GostR3410_94_cc) { ret = SSL_PKEY_GOST94; } 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_read_buffer(SSL *s) { unsigned char *p; size_t len, align = 0, headerlen; if (SSL_IS_DTLS(s)) headerlen = DTLS1_RT_HEADER_LENGTH; else headerlen = SSL3_RT_HEADER_LENGTH; #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD - 1); #endif if (s->s3->rbuf.buf == NULL) { len = SSL3_RT_MAX_PLAIN_LENGTH + SSL3_RT_MAX_ENCRYPTED_OVERHEAD + headerlen + align; if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER) { s->s3->init_extra = 1; len += SSL3_RT_MAX_EXTRA; } if ((p = malloc(len)) == NULL) goto err; s->s3->rbuf.buf = p; s->s3->rbuf.len = len; } s->packet = &(s->s3->rbuf.buf[0]); return 1; err: SSLerr(SSL_F_SSL3_SETUP_READ_BUFFER, ERR_R_MALLOC_FAILURE); return 0; } int ssl3_setup_write_buffer(SSL *s) { unsigned char *p; size_t len, align = 0, headerlen; if (SSL_IS_DTLS(s)) headerlen = DTLS1_RT_HEADER_LENGTH + 1; else headerlen = SSL3_RT_HEADER_LENGTH; #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD - 1); #endif if (s->s3->wbuf.buf == NULL) { len = s->max_send_fragment + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD + headerlen + align; if (!(s->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: SSLerr(SSL_F_SSL3_SETUP_WRITE_BUFFER, 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; }