diff options
Diffstat (limited to 'ics-openvpn-stripped/main/openssl/apps/s_cb.c')
| -rw-r--r-- | ics-openvpn-stripped/main/openssl/apps/s_cb.c | 934 |
1 files changed, 934 insertions, 0 deletions
diff --git a/ics-openvpn-stripped/main/openssl/apps/s_cb.c b/ics-openvpn-stripped/main/openssl/apps/s_cb.c new file mode 100644 index 00000000..146a9607 --- /dev/null +++ b/ics-openvpn-stripped/main/openssl/apps/s_cb.c @@ -0,0 +1,934 @@ +/* apps/s_cb.c - callback functions used by s_client, s_server, and s_time */ +/* 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) 1998-2006 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 <stdio.h> +#include <stdlib.h> +#define USE_SOCKETS +#define NON_MAIN +#include "apps.h" +#undef NON_MAIN +#undef USE_SOCKETS +#include <openssl/err.h> +#include <openssl/rand.h> +#include <openssl/x509.h> +#include <openssl/ssl.h> +#include "s_apps.h" + +#define COOKIE_SECRET_LENGTH 16 + +int verify_depth=0; +int verify_error=X509_V_OK; +int verify_return_error=0; +unsigned char cookie_secret[COOKIE_SECRET_LENGTH]; +int cookie_initialized=0; + +int MS_CALLBACK verify_callback(int ok, X509_STORE_CTX *ctx) + { + X509 *err_cert; + int err,depth; + + err_cert=X509_STORE_CTX_get_current_cert(ctx); + err= X509_STORE_CTX_get_error(ctx); + depth= X509_STORE_CTX_get_error_depth(ctx); + + BIO_printf(bio_err,"depth=%d ",depth); + if (err_cert) + { + X509_NAME_print_ex(bio_err, X509_get_subject_name(err_cert), + 0, XN_FLAG_ONELINE); + BIO_puts(bio_err, "\n"); + } + else + BIO_puts(bio_err, "<no cert>\n"); + if (!ok) + { + BIO_printf(bio_err,"verify error:num=%d:%s\n",err, + X509_verify_cert_error_string(err)); + if (verify_depth >= depth) + { + if (!verify_return_error) + ok=1; + verify_error=X509_V_OK; + } + else + { + ok=0; + verify_error=X509_V_ERR_CERT_CHAIN_TOO_LONG; + } + } + switch (err) + { + case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT: + BIO_puts(bio_err,"issuer= "); + X509_NAME_print_ex(bio_err, X509_get_issuer_name(err_cert), + 0, XN_FLAG_ONELINE); + BIO_puts(bio_err, "\n"); + break; + case X509_V_ERR_CERT_NOT_YET_VALID: + case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD: + BIO_printf(bio_err,"notBefore="); + ASN1_TIME_print(bio_err,X509_get_notBefore(err_cert)); + BIO_printf(bio_err,"\n"); + break; + case X509_V_ERR_CERT_HAS_EXPIRED: + case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD: + BIO_printf(bio_err,"notAfter="); + ASN1_TIME_print(bio_err,X509_get_notAfter(err_cert)); + BIO_printf(bio_err,"\n"); + break; + case X509_V_ERR_NO_EXPLICIT_POLICY: + policies_print(bio_err, ctx); + break; + } + if (err == X509_V_OK && ok == 2) + policies_print(bio_err, ctx); + + BIO_printf(bio_err,"verify return:%d\n",ok); + return(ok); + } + +int set_cert_stuff(SSL_CTX *ctx, char *cert_file, char *key_file) + { + if (cert_file != NULL) + { + /* + SSL *ssl; + X509 *x509; + */ + + if (SSL_CTX_use_certificate_file(ctx,cert_file, + SSL_FILETYPE_PEM) <= 0) + { + BIO_printf(bio_err,"unable to get certificate from '%s'\n",cert_file); + ERR_print_errors(bio_err); + return(0); + } + if (key_file == NULL) key_file=cert_file; + if (SSL_CTX_use_PrivateKey_file(ctx,key_file, + SSL_FILETYPE_PEM) <= 0) + { + BIO_printf(bio_err,"unable to get private key from '%s'\n",key_file); + ERR_print_errors(bio_err); + return(0); + } + + /* + In theory this is no longer needed + ssl=SSL_new(ctx); + x509=SSL_get_certificate(ssl); + + if (x509 != NULL) { + EVP_PKEY *pktmp; + pktmp = X509_get_pubkey(x509); + EVP_PKEY_copy_parameters(pktmp, + SSL_get_privatekey(ssl)); + EVP_PKEY_free(pktmp); + } + SSL_free(ssl); + */ + + /* If we are using DSA, we can copy the parameters from + * the private key */ + + + /* Now we know that a key and cert have been set against + * the SSL context */ + if (!SSL_CTX_check_private_key(ctx)) + { + BIO_printf(bio_err,"Private key does not match the certificate public key\n"); + return(0); + } + } + return(1); + } + +int set_cert_key_stuff(SSL_CTX *ctx, X509 *cert, EVP_PKEY *key) + { + if (cert == NULL) + return 1; + if (SSL_CTX_use_certificate(ctx,cert) <= 0) + { + BIO_printf(bio_err,"error setting certificate\n"); + ERR_print_errors(bio_err); + return 0; + } + if (SSL_CTX_use_PrivateKey(ctx,key) <= 0) + { + BIO_printf(bio_err,"error setting private key\n"); + ERR_print_errors(bio_err); + return 0; + } + + + /* Now we know that a key and cert have been set against + * the SSL context */ + if (!SSL_CTX_check_private_key(ctx)) + { + BIO_printf(bio_err,"Private key does not match the certificate public key\n"); + return 0; + } + return 1; + } + +long MS_CALLBACK bio_dump_callback(BIO *bio, int cmd, const char *argp, + int argi, long argl, long ret) + { + BIO *out; + + out=(BIO *)BIO_get_callback_arg(bio); + if (out == NULL) return(ret); + + if (cmd == (BIO_CB_READ|BIO_CB_RETURN)) + { + BIO_printf(out,"read from %p [%p] (%lu bytes => %ld (0x%lX))\n", + (void *)bio,argp,(unsigned long)argi,ret,ret); + BIO_dump(out,argp,(int)ret); + return(ret); + } + else if (cmd == (BIO_CB_WRITE|BIO_CB_RETURN)) + { + BIO_printf(out,"write to %p [%p] (%lu bytes => %ld (0x%lX))\n", + (void *)bio,argp,(unsigned long)argi,ret,ret); + BIO_dump(out,argp,(int)ret); + } + return(ret); + } + +void MS_CALLBACK apps_ssl_info_callback(const SSL *s, int where, int ret) + { + const char *str; + int w; + + w=where& ~SSL_ST_MASK; + + if (w & SSL_ST_CONNECT) str="SSL_connect"; + else if (w & SSL_ST_ACCEPT) str="SSL_accept"; + else str="undefined"; + + if (where & SSL_CB_LOOP) + { + BIO_printf(bio_err,"%s:%s\n",str,SSL_state_string_long(s)); + } + else if (where & SSL_CB_ALERT) + { + str=(where & SSL_CB_READ)?"read":"write"; + BIO_printf(bio_err,"SSL3 alert %s:%s:%s\n", + str, + SSL_alert_type_string_long(ret), + SSL_alert_desc_string_long(ret)); + } + else if (where & SSL_CB_EXIT) + { + if (ret == 0) + BIO_printf(bio_err,"%s:failed in %s\n", + str,SSL_state_string_long(s)); + else if (ret < 0) + { + BIO_printf(bio_err,"%s:error in %s\n", + str,SSL_state_string_long(s)); + } + } + } + + +void MS_CALLBACK msg_cb(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg) + { + BIO *bio = arg; + const char *str_write_p, *str_version, *str_content_type = "", *str_details1 = "", *str_details2= ""; + + str_write_p = write_p ? ">>>" : "<<<"; + + switch (version) + { + case SSL2_VERSION: + str_version = "SSL 2.0"; + break; + case SSL3_VERSION: + str_version = "SSL 3.0 "; + break; + case TLS1_VERSION: + str_version = "TLS 1.0 "; + break; + case TLS1_1_VERSION: + str_version = "TLS 1.1 "; + break; + case TLS1_2_VERSION: + str_version = "TLS 1.2 "; + break; + case DTLS1_VERSION: + str_version = "DTLS 1.0 "; + break; + case DTLS1_BAD_VER: + str_version = "DTLS 1.0 (bad) "; + break; + default: + str_version = "???"; + } + + if (version == SSL2_VERSION) + { + str_details1 = "???"; + + if (len > 0) + { + switch (((const unsigned char*)buf)[0]) + { + case 0: + str_details1 = ", ERROR:"; + str_details2 = " ???"; + if (len >= 3) + { + unsigned err = (((const unsigned char*)buf)[1]<<8) + ((const unsigned char*)buf)[2]; + + switch (err) + { + case 0x0001: + str_details2 = " NO-CIPHER-ERROR"; + break; + case 0x0002: + str_details2 = " NO-CERTIFICATE-ERROR"; + break; + case 0x0004: + str_details2 = " BAD-CERTIFICATE-ERROR"; + break; + case 0x0006: + str_details2 = " UNSUPPORTED-CERTIFICATE-TYPE-ERROR"; + break; + } + } + + break; + case 1: + str_details1 = ", CLIENT-HELLO"; + break; + case 2: + str_details1 = ", CLIENT-MASTER-KEY"; + break; + case 3: + str_details1 = ", CLIENT-FINISHED"; + break; + case 4: + str_details1 = ", SERVER-HELLO"; + break; + case 5: + str_details1 = ", SERVER-VERIFY"; + break; + case 6: + str_details1 = ", SERVER-FINISHED"; + break; + case 7: + str_details1 = ", REQUEST-CERTIFICATE"; + break; + case 8: + str_details1 = ", CLIENT-CERTIFICATE"; + break; + } + } + } + + if (version == SSL3_VERSION || + version == TLS1_VERSION || + version == TLS1_1_VERSION || + version == TLS1_2_VERSION || + version == DTLS1_VERSION || + version == DTLS1_BAD_VER) + { + switch (content_type) + { + case 20: + str_content_type = "ChangeCipherSpec"; + break; + case 21: + str_content_type = "Alert"; + break; + case 22: + str_content_type = "Handshake"; + break; + } + + if (content_type == 21) /* Alert */ + { + str_details1 = ", ???"; + + if (len == 2) + { + switch (((const unsigned char*)buf)[0]) + { + case 1: + str_details1 = ", warning"; + break; + case 2: + str_details1 = ", fatal"; + break; + } + + str_details2 = " ???"; + switch (((const unsigned char*)buf)[1]) + { + case 0: + str_details2 = " close_notify"; + break; + case 10: + str_details2 = " unexpected_message"; + break; + case 20: + str_details2 = " bad_record_mac"; + break; + case 21: + str_details2 = " decryption_failed"; + break; + case 22: + str_details2 = " record_overflow"; + break; + case 30: + str_details2 = " decompression_failure"; + break; + case 40: + str_details2 = " handshake_failure"; + break; + case 42: + str_details2 = " bad_certificate"; + break; + case 43: + str_details2 = " unsupported_certificate"; + break; + case 44: + str_details2 = " certificate_revoked"; + break; + case 45: + str_details2 = " certificate_expired"; + break; + case 46: + str_details2 = " certificate_unknown"; + break; + case 47: + str_details2 = " illegal_parameter"; + break; + case 48: + str_details2 = " unknown_ca"; + break; + case 49: + str_details2 = " access_denied"; + break; + case 50: + str_details2 = " decode_error"; + break; + case 51: + str_details2 = " decrypt_error"; + break; + case 60: + str_details2 = " export_restriction"; + break; + case 70: + str_details2 = " protocol_version"; + break; + case 71: + str_details2 = " insufficient_security"; + break; + case 80: + str_details2 = " internal_error"; + break; + case 90: + str_details2 = " user_canceled"; + break; + case 100: + str_details2 = " no_renegotiation"; + break; + case 110: + str_details2 = " unsupported_extension"; + break; + case 111: + str_details2 = " certificate_unobtainable"; + break; + case 112: + str_details2 = " unrecognized_name"; + break; + case 113: + str_details2 = " bad_certificate_status_response"; + break; + case 114: + str_details2 = " bad_certificate_hash_value"; + break; + case 115: + str_details2 = " unknown_psk_identity"; + break; + } + } + } + + if (content_type == 22) /* Handshake */ + { + str_details1 = "???"; + + if (len > 0) + { + switch (((const unsigned char*)buf)[0]) + { + case 0: + str_details1 = ", HelloRequest"; + break; + case 1: + str_details1 = ", ClientHello"; + break; + case 2: + str_details1 = ", ServerHello"; + break; + case 3: + str_details1 = ", HelloVerifyRequest"; + break; + case 11: + str_details1 = ", Certificate"; + break; + case 12: + str_details1 = ", ServerKeyExchange"; + break; + case 13: + str_details1 = ", CertificateRequest"; + break; + case 14: + str_details1 = ", ServerHelloDone"; + break; + case 15: + str_details1 = ", CertificateVerify"; + break; + case 16: + str_details1 = ", ClientKeyExchange"; + break; + case 20: + str_details1 = ", Finished"; + break; + } + } + } + +#ifndef OPENSSL_NO_HEARTBEATS + if (content_type == 24) /* Heartbeat */ + { + str_details1 = ", Heartbeat"; + + if (len > 0) + { + switch (((const unsigned char*)buf)[0]) + { + case 1: + str_details1 = ", HeartbeatRequest"; + break; + case 2: + str_details1 = ", HeartbeatResponse"; + break; + } + } + } +#endif + } + + BIO_printf(bio, "%s %s%s [length %04lx]%s%s\n", str_write_p, str_version, str_content_type, (unsigned long)len, str_details1, str_details2); + + if (len > 0) + { + size_t num, i; + + BIO_printf(bio, " "); + num = len; +#if 0 + if (num > 16) + num = 16; +#endif + for (i = 0; i < num; i++) + { + if (i % 16 == 0 && i > 0) + BIO_printf(bio, "\n "); + BIO_printf(bio, " %02x", ((const unsigned char*)buf)[i]); + } + if (i < len) + BIO_printf(bio, " ..."); + BIO_printf(bio, "\n"); + } + (void)BIO_flush(bio); + } + +void MS_CALLBACK tlsext_cb(SSL *s, int client_server, int type, + unsigned char *data, int len, + void *arg) + { + BIO *bio = arg; + char *extname; + + switch(type) + { + case TLSEXT_TYPE_server_name: + extname = "server name"; + break; + + case TLSEXT_TYPE_max_fragment_length: + extname = "max fragment length"; + break; + + case TLSEXT_TYPE_client_certificate_url: + extname = "client certificate URL"; + break; + + case TLSEXT_TYPE_trusted_ca_keys: + extname = "trusted CA keys"; + break; + + case TLSEXT_TYPE_truncated_hmac: + extname = "truncated HMAC"; + break; + + case TLSEXT_TYPE_status_request: + extname = "status request"; + break; + + case TLSEXT_TYPE_user_mapping: + extname = "user mapping"; + break; + + case TLSEXT_TYPE_client_authz: + extname = "client authz"; + break; + + case TLSEXT_TYPE_server_authz: + extname = "server authz"; + break; + + case TLSEXT_TYPE_cert_type: + extname = "cert type"; + break; + + case TLSEXT_TYPE_elliptic_curves: + extname = "elliptic curves"; + break; + + case TLSEXT_TYPE_ec_point_formats: + extname = "EC point formats"; + break; + + case TLSEXT_TYPE_srp: + extname = "SRP"; + break; + + case TLSEXT_TYPE_signature_algorithms: + extname = "signature algorithms"; + break; + + case TLSEXT_TYPE_use_srtp: + extname = "use SRTP"; + break; + + case TLSEXT_TYPE_heartbeat: + extname = "heartbeat"; + break; + + case TLSEXT_TYPE_session_ticket: + extname = "session ticket"; + break; + + case TLSEXT_TYPE_renegotiate: + extname = "renegotiation info"; + break; + +#ifdef TLSEXT_TYPE_opaque_prf_input + case TLSEXT_TYPE_opaque_prf_input: + extname = "opaque PRF input"; + break; +#endif +#ifdef TLSEXT_TYPE_next_proto_neg + case TLSEXT_TYPE_next_proto_neg: + extname = "next protocol"; + break; +#endif + + case TLSEXT_TYPE_padding: + extname = "TLS padding"; + break; + + default: + extname = "unknown"; + break; + + } + + BIO_printf(bio, "TLS %s extension \"%s\" (id=%d), len=%d\n", + client_server ? "server": "client", + extname, type, len); + BIO_dump(bio, (char *)data, len); + (void)BIO_flush(bio); + } + +int MS_CALLBACK generate_cookie_callback(SSL *ssl, unsigned char *cookie, unsigned int *cookie_len) + { + unsigned char *buffer, result[EVP_MAX_MD_SIZE]; + unsigned int length, resultlength; + union { + struct sockaddr sa; + struct sockaddr_in s4; +#if OPENSSL_USE_IPV6 + struct sockaddr_in6 s6; +#endif + } peer; + + /* Initialize a random secret */ + if (!cookie_initialized) + { + if (!RAND_bytes(cookie_secret, COOKIE_SECRET_LENGTH)) + { + BIO_printf(bio_err,"error setting random cookie secret\n"); + return 0; + } + cookie_initialized = 1; + } + + /* Read peer information */ + (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer); + + /* Create buffer with peer's address and port */ + length = 0; + switch (peer.sa.sa_family) + { + case AF_INET: + length += sizeof(struct in_addr); + length += sizeof(peer.s4.sin_port); + break; +#if OPENSSL_USE_IPV6 + case AF_INET6: + length += sizeof(struct in6_addr); + length += sizeof(peer.s6.sin6_port); + break; +#endif + default: + OPENSSL_assert(0); + break; + } + buffer = OPENSSL_malloc(length); + + if (buffer == NULL) + { + BIO_printf(bio_err,"out of memory\n"); + return 0; + } + + switch (peer.sa.sa_family) + { + case AF_INET: + memcpy(buffer, + &peer.s4.sin_port, + sizeof(peer.s4.sin_port)); + memcpy(buffer + sizeof(peer.s4.sin_port), + &peer.s4.sin_addr, + sizeof(struct in_addr)); + break; +#if OPENSSL_USE_IPV6 + case AF_INET6: + memcpy(buffer, + &peer.s6.sin6_port, + sizeof(peer.s6.sin6_port)); + memcpy(buffer + sizeof(peer.s6.sin6_port), + &peer.s6.sin6_addr, + sizeof(struct in6_addr)); + break; +#endif + default: + OPENSSL_assert(0); + break; + } + + /* Calculate HMAC of buffer using the secret */ + HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH, + buffer, length, result, &resultlength); + OPENSSL_free(buffer); + + memcpy(cookie, result, resultlength); + *cookie_len = resultlength; + + return 1; + } + +int MS_CALLBACK verify_cookie_callback(SSL *ssl, unsigned char *cookie, unsigned int cookie_len) + { + unsigned char *buffer, result[EVP_MAX_MD_SIZE]; + unsigned int length, resultlength; + union { + struct sockaddr sa; + struct sockaddr_in s4; +#if OPENSSL_USE_IPV6 + struct sockaddr_in6 s6; +#endif + } peer; + + /* If secret isn't initialized yet, the cookie can't be valid */ + if (!cookie_initialized) + return 0; + + /* Read peer information */ + (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer); + + /* Create buffer with peer's address and port */ + length = 0; + switch (peer.sa.sa_family) + { + case AF_INET: + length += sizeof(struct in_addr); + length += sizeof(peer.s4.sin_port); + break; +#if OPENSSL_USE_IPV6 + case AF_INET6: + length += sizeof(struct in6_addr); + length += sizeof(peer.s6.sin6_port); + break; +#endif + default: + OPENSSL_assert(0); + break; + } + buffer = OPENSSL_malloc(length); + + if (buffer == NULL) + { + BIO_printf(bio_err,"out of memory\n"); + return 0; + } + + switch (peer.sa.sa_family) + { + case AF_INET: + memcpy(buffer, + &peer.s4.sin_port, + sizeof(peer.s4.sin_port)); + memcpy(buffer + sizeof(peer.s4.sin_port), + &peer.s4.sin_addr, + sizeof(struct in_addr)); + break; +#if OPENSSL_USE_IPV6 + case AF_INET6: + memcpy(buffer, + &peer.s6.sin6_port, + sizeof(peer.s6.sin6_port)); + memcpy(buffer + sizeof(peer.s6.sin6_port), + &peer.s6.sin6_addr, + sizeof(struct in6_addr)); + break; +#endif + default: + OPENSSL_assert(0); + break; + } + + /* Calculate HMAC of buffer using the secret */ + HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH, + buffer, length, result, &resultlength); + OPENSSL_free(buffer); + + if (cookie_len == resultlength && memcmp(result, cookie, resultlength) == 0) + return 1; + + return 0; + } |