/* 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 #include #define USE_SOCKETS #define NON_MAIN #include "apps.h" #undef NON_MAIN #undef USE_SOCKETS #include #include #include #include #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, "\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, STACK_OF(X509) *chain) { 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; } if (chain && !SSL_CTX_set1_chain(ctx, chain)) { BIO_printf(bio_err,"error setting certificate chain\n"); ERR_print_errors(bio_err); return 0; } return 1; } int ssl_print_sigalgs(BIO *out, SSL *s) { int i, nsig; nsig = SSL_get_sigalgs(s, -1, NULL, NULL, NULL, NULL, NULL); if (nsig == 0) return 1; BIO_puts(out, "Signature Algorithms: "); for (i = 0; i < nsig; i++) { int hash_nid, sign_nid; unsigned char rhash, rsign; const char *sstr = NULL; SSL_get_sigalgs(s, i, &sign_nid, &hash_nid, NULL, &rsign, &rhash); if (i) BIO_puts(out, ":"); if (sign_nid == EVP_PKEY_RSA) sstr = "RSA"; else if(sign_nid == EVP_PKEY_DSA) sstr = "DSA"; else if(sign_nid == EVP_PKEY_EC) sstr = "ECDSA"; if (sstr) BIO_printf(out,"%s+", sstr); else BIO_printf(out,"0x%02X+", (int)rsign); if (hash_nid != NID_undef) BIO_printf(out, "%s", OBJ_nid2sn(hash_nid)); else BIO_printf(out,"0x%02X", (int)rhash); } BIO_puts(out, "\n"); return 1; } int ssl_print_curves(BIO *out, SSL *s) { int i, ncurves, *curves, nid; const char *cname; ncurves = SSL_get1_curves(s, NULL); if (ncurves <= 0) return 1; curves = OPENSSL_malloc(ncurves * sizeof(int)); SSL_get1_curves(s, curves); BIO_puts(out, "Supported Elliptic Curves: "); for (i = 0; i < ncurves; i++) { if (i) BIO_puts(out, ":"); nid = curves[i]; /* If unrecognised print out hex version */ if (nid & TLSEXT_nid_unknown) BIO_printf(out, "0x%04X", nid & 0xFFFF); else { /* Use NIST name for curve if it exists */ cname = EC_curve_nid2nist(nid); if (!cname) cname = OBJ_nid2sn(nid); BIO_printf(out, "%s", cname); } } BIO_puts(out, "\nShared Elliptic curves: "); OPENSSL_free(curves); ncurves = SSL_get_shared_curve(s, -1); for (i = 0; i < ncurves; i++) { if (i) BIO_puts(out, ":"); nid = SSL_get_shared_curve(s, i); cname = EC_curve_nid2nist(nid); if (!cname) cname = OBJ_nid2sn(nid); BIO_printf(out, "%s", cname); } if (ncurves == 0) BIO_puts(out, "NONE"); BIO_puts(out, "\n"); 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 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; }