/* ssl/s3_both.c */ /* 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 /* * 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; int i; unsigned long l; if (s->state == a) { p = ssl_handshake_start(s); i = s->method->ssl3_enc->final_finish_mac(s, sender, slen, s->s3->tmp.finish_md); if (i == 0) return 0; s->s3->tmp.finish_md_len = i; memcpy(p, s->s3->tmp.finish_md, i); l = i; /* * Copy the finished so we can use it for renegotiation checks */ if (s->type == SSL_ST_CONNECT) { OPENSSL_assert(i <= EVP_MAX_MD_SIZE); memcpy(s->s3->previous_client_finished, s->s3->tmp.finish_md, i); s->s3->previous_client_finished_len = i; } else { OPENSSL_assert(i <= EVP_MAX_MD_SIZE); memcpy(s->s3->previous_server_finished, s->s3->tmp.finish_md, i); s->s3->previous_server_finished_len = i; } if(!ssl_set_handshake_header(s, SSL3_MT_FINISHED, l)) { SSLerr(SSL_F_SSL3_SEND_FINISHED, ERR_R_INTERNAL_ERROR); return -1; } s->state = b; } /* SSL3_ST_SEND_xxxxxx_HELLO_B */ return ssl_do_write(s); } #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, i, ok; 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 /* 64 argument should actually be 36+4 :-) */ n = s->method->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 (!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; p = (unsigned char *)s->init_msg; i = s->s3->tmp.peer_finish_md_len; if (i != n) { al = SSL_AD_DECODE_ERROR; SSLerr(SSL_F_SSL3_GET_FINISHED, SSL_R_BAD_DIGEST_LENGTH); goto f_err; } if (CRYPTO_memcmp(p, s->s3->tmp.peer_finish_md, i) != 0) { al = SSL_AD_DECRYPT_ERROR; SSLerr(SSL_F_SSL3_GET_FINISHED, SSL_R_DIGEST_CHECK_FAILED); goto f_err; } /* * Copy the finished so we can use it for renegotiation checks */ if (s->type == SSL_ST_ACCEPT) { OPENSSL_assert(i <= EVP_MAX_MD_SIZE); memcpy(s->s3->previous_client_finished, s->s3->tmp.peer_finish_md, i); s->s3->previous_client_finished_len = i; } else { OPENSSL_assert(i <= EVP_MAX_MD_SIZE); memcpy(s->s3->previous_server_finished, s->s3->tmp.peer_finish_md, i); s->s3->previous_server_finished_len = i; } 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_compression 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)); } unsigned long ssl3_output_cert_chain(SSL *s, CERT_PKEY *cpk) { unsigned char *p; unsigned long l = 3 + SSL_HM_HEADER_LENGTH(s); if (!ssl_add_cert_chain(s, cpk, &l)) return 0; l -= 3 + SSL_HM_HEADER_LENGTH(s); p = ssl_handshake_start(s); l2n3(l, p); l += 3; if(!ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE, l)) { SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN, ERR_R_INTERNAL_ERROR); return 0; } return l + SSL_HM_HEADER_LENGTH(s); } /* * 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->state = stn; 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) if (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; } 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 > (INT_MAX - 4)) { /* BUF_MEM_grow takes an 'int' parameter */ 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, (int)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; } #ifndef OPENSSL_NO_EC else if (i == EVP_PKEY_EC) { ret = SSL_PKEY_ECC; } #endif 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; } else if (x && (i == EVP_PKEY_DH || i == EVP_PKEY_DHX)) { /* * For DH two cases: DH certificate signed with RSA and DH * certificate signed with DSA. */ i = X509_certificate_type(x, pk); if (i & EVP_PKS_RSA) ret = SSL_PKEY_DH_RSA; else if (i & EVP_PKS_DSA) ret = SSL_PKEY_DH_DSA; } 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; SSL3_BUFFER *b; b = RECORD_LAYER_get_rbuf(&s->rlayer); if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) 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 (b->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; } #ifndef OPENSSL_NO_COMP if (ssl_allow_compression(s)) len += SSL3_RT_MAX_COMPRESSED_OVERHEAD; #endif if ((p = OPENSSL_malloc(len)) == NULL) goto err; b->buf = p; b->len = len; } s->packet = &(b->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; SSL3_BUFFER *wb; wb = RECORD_LAYER_get_wbuf(&s->rlayer); if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) 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 (wb->buf == NULL) { len = s->max_send_fragment + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD + headerlen + align; #ifndef OPENSSL_NO_COMP if (ssl_allow_compression(s)) len += SSL3_RT_MAX_COMPRESSED_OVERHEAD; #endif if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)) len += headerlen + align + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD; if ((p = OPENSSL_malloc(len)) == NULL) goto err; wb->buf = p; wb->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) { SSL3_BUFFER *wb; wb = RECORD_LAYER_get_wbuf(&s->rlayer); if (wb->buf != NULL) { OPENSSL_free(wb->buf); wb->buf = NULL; } return 1; } int ssl3_release_read_buffer(SSL *s) { SSL3_BUFFER *b; b = RECORD_LAYER_get_rbuf(&s->rlayer); if (b->buf != NULL) { OPENSSL_free(b->buf); b->buf = NULL; } return 1; } int ssl_allow_compression(SSL *s) { if (s->options & SSL_OP_NO_COMPRESSION) return 0; return ssl_security(s, SSL_SECOP_COMPRESSION, 0, 0, NULL); }