/* 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) 1998-2000 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). * */ #include <string.h> #include <stdio.h> #include <openssl/buffer.h> #include <openssl/rand.h> #include <openssl/objects.h> #include <openssl/evp.h> #include <openssl/x509.h> #include "ssl_locl.h" /* send s->init_buf in records of type 'type' */ 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) 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; int i; unsigned long l; if (s->state == a) { d=(unsigned char *)s->init_buf->data; p= &(d[4]); i=s->method->ssl3_enc->final_finish_mac(s, &(s->s3->finish_dgst1), &(s->s3->finish_dgst2), sender,slen,s->s3->tmp.finish_md); s->s3->tmp.finish_md_len = i; memcpy(p, s->s3->tmp.finish_md, i); p+=i; l=i; #ifdef WIN16 /* MSVC 1.5 does not clear the top bytes of the word unless * I do this. */ l&=0xffff; #endif *(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)); } int ssl3_get_finished(SSL *s, int a, int b) { int al,i,ok; long n; unsigned char *p; /* the mac has already been generated when we received the * change cipher spec message and is in s->s3->tmp.peer_finish_md */ n=ssl3_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; p = (unsigned char *)s->init_buf->data; 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 (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; } 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, X509 *x) { unsigned char *p; int n,i; unsigned long l=7; BUF_MEM *buf; X509_STORE_CTX xs_ctx; X509_OBJECT obj; /* TLSv1 sends a chain with nothing in it, instead of an alert */ buf=s->init_buf; if (!BUF_MEM_grow(buf,(int)(10))) { SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB); return(0); } if (x != NULL) { X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,NULL,NULL); for (;;) { n=i2d_X509(x,NULL); if (!BUF_MEM_grow(buf,(int)(n+l+3))) { SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB); return(0); } p=(unsigned char *)&(buf->data[l]); l2n3(n,p); i2d_X509(x,&p); l+=n+3; if (X509_NAME_cmp(X509_get_subject_name(x), X509_get_issuer_name(x)) == 0) break; i=X509_STORE_get_by_subject(&xs_ctx,X509_LU_X509, X509_get_issuer_name(x),&obj); if (i <= 0) break; x=obj.data.x509; /* Count is one too high since the X509_STORE_get uped the * ref count */ X509_free(x); } X509_STORE_CTX_cleanup(&xs_ctx); } /* Thawte special :-) */ if (s->ctx->extra_certs != NULL) for (i=0; i<sk_X509_num(s->ctx->extra_certs); i++) { x=sk_X509_value(s->ctx->extra_certs,i); n=i2d_X509(x,NULL); if (!BUF_MEM_grow(buf,(int)(n+l+3))) { SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB); return(0); } p=(unsigned char *)&(buf->data[l]); l2n3(n,p); i2d_X509(x,&p); l+=n+3; } 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; return((int)s->s3->tmp.message_size); } 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=ssl3_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; } } 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); } ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, 4); 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(s->init_buf,(int)l)) { SSLerr(SSL_F_SSL3_GET_MESSAGE,ERR_R_BUF_LIB); goto err; } s->s3->tmp.message_size=l; s->state=stn; s->init_num=0; } /* next state (stn) */ p=(unsigned char *)s->init_buf->data; n=s->s3->tmp.message_size; while (n > 0) { i=ssl3_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; } ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num); *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,j; 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; if (x != NULL) { j=X509_get_ext_count(x); /* check to see if this is a signing only certificate */ /* EAY EAY EAY EAY */ } } else if (i == EVP_PKEY_DSA) { ret=SSL_PKEY_DSA_SIGN; } else if (i == EVP_PKEY_DH) { /* if we just have a key, we needs to be guess */ if (x == NULL) ret=SSL_PKEY_DH_DSA; else { j=X509_get_signature_type(x); if (j == EVP_PKEY_RSA) ret=SSL_PKEY_DH_RSA; else if (j== EVP_PKEY_DSA) ret=SSL_PKEY_DH_DSA; else ret= -1; } } else ret= -1; 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: 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: 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: al=SSL_AD_UNKNOWN_CA; break; case X509_V_ERR_APPLICATION_VERIFICATION: al=SSL_AD_HANDSHAKE_FAILURE; break; default: al=SSL_AD_CERTIFICATE_UNKNOWN; break; } return(al); } int ssl3_setup_buffers(SSL *s) { unsigned char *p; unsigned int extra; if (s->s3->rbuf.buf == NULL) { if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER) extra=SSL3_RT_MAX_EXTRA; else extra=0; if ((p=OPENSSL_malloc(SSL3_RT_MAX_PACKET_SIZE+extra)) == NULL) goto err; s->s3->rbuf.buf=p; } if (s->s3->wbuf.buf == NULL) { if ((p=OPENSSL_malloc(SSL3_RT_MAX_PACKET_SIZE)) == NULL) goto err; s->s3->wbuf.buf=p; } s->packet= &(s->s3->rbuf.buf[0]); return(1); err: SSLerr(SSL_F_SSL3_SETUP_BUFFERS,ERR_R_MALLOC_FAILURE); return(0); }