/* ssl/s2_lib.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) 1998-2007 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 "ssl_locl.h" #ifndef OPENSSL_NO_SSL2 # include <stdio.h> # include <openssl/objects.h> # include <openssl/evp.h> # include <openssl/md5.h> const char ssl2_version_str[] = "SSLv2" OPENSSL_VERSION_PTEXT; # define SSL2_NUM_CIPHERS (sizeof(ssl2_ciphers)/sizeof(SSL_CIPHER)) /* list of available SSLv2 ciphers (sorted by id) */ OPENSSL_GLOBAL const SSL_CIPHER ssl2_ciphers[] = { # if 0 /* NULL_WITH_MD5 v3 */ { 1, SSL2_TXT_NULL_WITH_MD5, SSL2_CK_NULL_WITH_MD5, SSL_kRSA, SSL_aRSA, SSL_eNULL, SSL_MD5, SSL_SSLV2, SSL_EXPORT | SSL_EXP40 | SSL_STRONG_NONE, 0, 0, 0, }, # endif /* RC4_128_WITH_MD5 */ { 1, SSL2_TXT_RC4_128_WITH_MD5, SSL2_CK_RC4_128_WITH_MD5, SSL_kRSA, SSL_aRSA, SSL_RC4, SSL_MD5, SSL_SSLV2, SSL_NOT_DEFAULT | SSL_NOT_EXP | SSL_MEDIUM, 0, 128, 128, }, # if 0 /* RC4_128_EXPORT40_WITH_MD5 */ { 1, SSL2_TXT_RC4_128_EXPORT40_WITH_MD5, SSL2_CK_RC4_128_EXPORT40_WITH_MD5, SSL_kRSA, SSL_aRSA, SSL_RC4, SSL_MD5, SSL_SSLV2, SSL_NOT_DEFAULT | SSL_EXPORT | SSL_EXP40, SSL2_CF_5_BYTE_ENC, 40, 128, }, # endif /* RC2_128_CBC_WITH_MD5 */ { 1, SSL2_TXT_RC2_128_CBC_WITH_MD5, SSL2_CK_RC2_128_CBC_WITH_MD5, SSL_kRSA, SSL_aRSA, SSL_RC2, SSL_MD5, SSL_SSLV2, SSL_NOT_DEFAULT | SSL_NOT_EXP | SSL_MEDIUM, 0, 128, 128, }, # if 0 /* RC2_128_CBC_EXPORT40_WITH_MD5 */ { 1, SSL2_TXT_RC2_128_CBC_EXPORT40_WITH_MD5, SSL2_CK_RC2_128_CBC_EXPORT40_WITH_MD5, SSL_kRSA, SSL_aRSA, SSL_RC2, SSL_MD5, SSL_SSLV2, SSL_NOT_DEFAULT | SSL_EXPORT | SSL_EXP40, SSL2_CF_5_BYTE_ENC, 40, 128, }, # endif # ifndef OPENSSL_NO_IDEA /* IDEA_128_CBC_WITH_MD5 */ { 1, SSL2_TXT_IDEA_128_CBC_WITH_MD5, SSL2_CK_IDEA_128_CBC_WITH_MD5, SSL_kRSA, SSL_aRSA, SSL_IDEA, SSL_MD5, SSL_SSLV2, SSL_NOT_DEFAULT | SSL_NOT_EXP | SSL_MEDIUM, 0, 128, 128, }, # endif # if 0 /* DES_64_CBC_WITH_MD5 */ { 1, SSL2_TXT_DES_64_CBC_WITH_MD5, SSL2_CK_DES_64_CBC_WITH_MD5, SSL_kRSA, SSL_aRSA, SSL_DES, SSL_MD5, SSL_SSLV2, SSL_NOT_DEFAULT | SSL_NOT_EXP | SSL_LOW, 0, 56, 56, }, # endif /* DES_192_EDE3_CBC_WITH_MD5 */ { 1, SSL2_TXT_DES_192_EDE3_CBC_WITH_MD5, SSL2_CK_DES_192_EDE3_CBC_WITH_MD5, SSL_kRSA, SSL_aRSA, SSL_3DES, SSL_MD5, SSL_SSLV2, SSL_NOT_DEFAULT | SSL_NOT_EXP | SSL_MEDIUM, 0, 112, 168, }, # if 0 /* RC4_64_WITH_MD5 */ { 1, SSL2_TXT_RC4_64_WITH_MD5, SSL2_CK_RC4_64_WITH_MD5, SSL_kRSA, SSL_aRSA, SSL_RC4, SSL_MD5, SSL_SSLV2, SSL_NOT_DEFAULT | SSL_NOT_EXP | SSL_LOW, SSL2_CF_8_BYTE_ENC, 64, 64, }, # endif # if 0 /* NULL SSLeay (testing) */ { 0, SSL2_TXT_NULL, SSL2_CK_NULL, 0, 0, 0, 0, SSL_SSLV2, SSL_STRONG_NONE, 0, 0, 0, }, # endif /* end of list :-) */ }; long ssl2_default_timeout(void) { return (300); } int ssl2_num_ciphers(void) { return (SSL2_NUM_CIPHERS); } const SSL_CIPHER *ssl2_get_cipher(unsigned int u) { if (u < SSL2_NUM_CIPHERS) return (&(ssl2_ciphers[SSL2_NUM_CIPHERS - 1 - u])); else return (NULL); } int ssl2_pending(const SSL *s) { return SSL_in_init(s) ? 0 : s->s2->ract_data_length; } int ssl2_new(SSL *s) { SSL2_STATE *s2; if ((s2 = OPENSSL_malloc(sizeof *s2)) == NULL) goto err; memset(s2, 0, sizeof *s2); # if SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER + 3 > SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER + 2 # error "assertion failed" # endif if ((s2->rbuf = OPENSSL_malloc(SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER + 2)) == NULL) goto err; /* * wbuf needs one byte more because when using two-byte headers, we leave * the first byte unused in do_ssl_write (s2_pkt.c) */ if ((s2->wbuf = OPENSSL_malloc(SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER + 3)) == NULL) goto err; s->s2 = s2; ssl2_clear(s); return (1); err: if (s2 != NULL) { if (s2->wbuf != NULL) OPENSSL_free(s2->wbuf); if (s2->rbuf != NULL) OPENSSL_free(s2->rbuf); OPENSSL_free(s2); } return (0); } void ssl2_free(SSL *s) { SSL2_STATE *s2; if (s == NULL) return; s2 = s->s2; if (s2->rbuf != NULL) OPENSSL_free(s2->rbuf); if (s2->wbuf != NULL) OPENSSL_free(s2->wbuf); OPENSSL_cleanse(s2, sizeof *s2); OPENSSL_free(s2); s->s2 = NULL; } void ssl2_clear(SSL *s) { SSL2_STATE *s2; unsigned char *rbuf, *wbuf; s2 = s->s2; rbuf = s2->rbuf; wbuf = s2->wbuf; memset(s2, 0, sizeof *s2); s2->rbuf = rbuf; s2->wbuf = wbuf; s2->clear_text = 1; s->packet = s2->rbuf; s->version = SSL2_VERSION; s->packet_length = 0; } long ssl2_ctrl(SSL *s, int cmd, long larg, void *parg) { int ret = 0; switch (cmd) { case SSL_CTRL_GET_SESSION_REUSED: ret = s->hit; break; case SSL_CTRL_CHECK_PROTO_VERSION: return ssl3_ctrl(s, SSL_CTRL_CHECK_PROTO_VERSION, larg, parg); default: break; } return (ret); } long ssl2_callback_ctrl(SSL *s, int cmd, void (*fp) (void)) { return (0); } long ssl2_ctx_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg) { return (0); } long ssl2_ctx_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp) (void)) { return (0); } /* * This function needs to check if the ciphers required are actually * available */ const SSL_CIPHER *ssl2_get_cipher_by_char(const unsigned char *p) { SSL_CIPHER c; const SSL_CIPHER *cp; unsigned long id; id = 0x02000000L | ((unsigned long)p[0] << 16L) | ((unsigned long)p[1] << 8L) | (unsigned long)p[2]; c.id = id; cp = OBJ_bsearch_ssl_cipher_id(&c, ssl2_ciphers, SSL2_NUM_CIPHERS); return cp; } int ssl2_put_cipher_by_char(const SSL_CIPHER *c, unsigned char *p) { long l; if (p != NULL) { l = c->id; if ((l & 0xff000000) != 0x02000000 && l != SSL3_CK_FALLBACK_SCSV) return (0); p[0] = ((unsigned char)(l >> 16L)) & 0xFF; p[1] = ((unsigned char)(l >> 8L)) & 0xFF; p[2] = ((unsigned char)(l)) & 0xFF; } return (3); } int ssl2_generate_key_material(SSL *s) { unsigned int i; EVP_MD_CTX ctx; unsigned char *km; unsigned char c = '0'; const EVP_MD *md5; int md_size; md5 = EVP_md5(); # ifdef CHARSET_EBCDIC c = os_toascii['0']; /* Must be an ASCII '0', not EBCDIC '0', see * SSLv2 docu */ # endif EVP_MD_CTX_init(&ctx); km = s->s2->key_material; if (s->session->master_key_length < 0 || s->session->master_key_length > (int)sizeof(s->session->master_key)) { SSLerr(SSL_F_SSL2_GENERATE_KEY_MATERIAL, ERR_R_INTERNAL_ERROR); return 0; } md_size = EVP_MD_size(md5); if (md_size < 0) return 0; for (i = 0; i < s->s2->key_material_length; i += md_size) { if (((km - s->s2->key_material) + md_size) > (int)sizeof(s->s2->key_material)) { /* * EVP_DigestFinal_ex() below would write beyond buffer */ SSLerr(SSL_F_SSL2_GENERATE_KEY_MATERIAL, ERR_R_INTERNAL_ERROR); return 0; } EVP_DigestInit_ex(&ctx, md5, NULL); OPENSSL_assert(s->session->master_key_length >= 0 && s->session->master_key_length <= (int)sizeof(s->session->master_key)); EVP_DigestUpdate(&ctx, s->session->master_key, s->session->master_key_length); EVP_DigestUpdate(&ctx, &c, 1); c++; EVP_DigestUpdate(&ctx, s->s2->challenge, s->s2->challenge_length); EVP_DigestUpdate(&ctx, s->s2->conn_id, s->s2->conn_id_length); EVP_DigestFinal_ex(&ctx, km, NULL); km += md_size; } EVP_MD_CTX_cleanup(&ctx); return 1; } void ssl2_return_error(SSL *s, int err) { if (!s->error) { s->error = 3; s->error_code = err; ssl2_write_error(s); } } void ssl2_write_error(SSL *s) { unsigned char buf[3]; int i, error; buf[0] = SSL2_MT_ERROR; buf[1] = (s->error_code >> 8) & 0xff; buf[2] = (s->error_code) & 0xff; /* state=s->rwstate;*/ error = s->error; /* number of bytes left to write */ s->error = 0; OPENSSL_assert(error >= 0 && error <= (int)sizeof(buf)); i = ssl2_write(s, &(buf[3 - error]), error); /* if (i == error) s->rwstate=state; */ if (i < 0) s->error = error; else { s->error = error - i; if (s->error == 0) if (s->msg_callback) { /* ERROR */ s->msg_callback(1, s->version, 0, buf, 3, s, s->msg_callback_arg); } } } int ssl2_shutdown(SSL *s) { s->shutdown = (SSL_SENT_SHUTDOWN | SSL_RECEIVED_SHUTDOWN); return (1); } #else /* !OPENSSL_NO_SSL2 */ # if PEDANTIC static void *dummy = &dummy; # endif #endif