X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=ssl%2Fs2_lib.c;h=1f5d7c991d84edb743723ed92d87722644e23790;hp=282d8bd71e7897317a4a4f19fff6ad3aac00fe41;hb=323a7e76e61d977ff9f00a8cff396033a6dc37d2;hpb=06ab81f9f7b055a4456798cb9ef3266160438a08 diff --git a/ssl/s2_lib.c b/ssl/s2_lib.c index 282d8bd71e..1f5d7c991d 100644 --- a/ssl/s2_lib.c +++ b/ssl/s2_lib.c @@ -5,21 +5,21 @@ * 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: @@ -34,10 +34,10 @@ * 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 + * 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 @@ -49,392 +49,519 @@ * 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 -#include "rsa.h" -#include "objects.h" #include "ssl_locl.h" +#ifndef OPENSSL_NO_SSL2 +# include +# include +# include +# include -#ifndef NOPROTO -static long ssl2_default_timeout(void ); -#else -static long ssl2_default_timeout(); -#endif +const char ssl2_version_str[] = "SSLv2" OPENSSL_VERSION_PTEXT; -char *ssl2_version_str="SSLv2 part of OpenSSL 0.9.2 31-Dec-1998"; +# define SSL2_NUM_CIPHERS (sizeof(ssl2_ciphers)/sizeof(SSL_CIPHER)) -#define SSL2_NUM_CIPHERS (sizeof(ssl2_ciphers)/sizeof(SSL_CIPHER)) - -SSL_CIPHER ssl2_ciphers[]={ +/* list of available SSLv2 ciphers (sorted by id) */ +OPENSSL_GLOBAL const SSL_CIPHER ssl2_ciphers[] = { +# if 0 /* NULL_WITH_MD5 v3 */ -#if 0 - { - 1, - SSL2_TXT_NULL_WITH_MD5, - SSL2_CK_NULL_WITH_MD5, - SSL_kRSA|SSL_aRSA|SSL_eNULL|SSL_MD5|SSL_EXP40|SSL_SSLV2, - 0, - SSL_ALL_CIPHERS, - }, -#endif -/* 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_EXP40|SSL_SSLV2, - SSL2_CF_5_BYTE_ENC, - SSL_ALL_CIPHERS, - }, + { + 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_NOT_EXP|SSL_SSLV2|SSL_MEDIUM, - 0, - SSL_ALL_CIPHERS, - }, -/* 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_EXP40|SSL_SSLV2, - SSL2_CF_5_BYTE_ENC, - SSL_ALL_CIPHERS, - }, + { + 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_EXP | SSL_MEDIUM, + 0, + 128, + 128, + }, + +/* 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_EXPORT | SSL_EXP40, + SSL2_CF_5_BYTE_ENC, + 40, + 128, + }, + /* 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_NOT_EXP|SSL_SSLV2|SSL_MEDIUM, - 0, - SSL_ALL_CIPHERS, - }, + { + 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_EXP | SSL_MEDIUM, + 0, + 128, + 128, + }, + +/* 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_EXPORT | SSL_EXP40, + SSL2_CF_5_BYTE_ENC, + 40, + 128, + }, + +# 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_NOT_EXP|SSL_SSLV2|SSL_MEDIUM, - 0, - SSL_ALL_CIPHERS, - }, + { + 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_EXP | SSL_MEDIUM, + 0, + 128, + 128, + }, +# endif + /* 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_NOT_EXP|SSL_SSLV2|SSL_LOW, - 0, - SSL_ALL_CIPHERS, - }, + { + 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_EXP | SSL_LOW, + 0, + 56, + 56, + }, + /* 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_NOT_EXP|SSL_SSLV2|SSL_HIGH, - 0, - SSL_ALL_CIPHERS, - }, + { + 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_EXP | SSL_HIGH, + 0, + 112, + 168, + }, + +# if 0 /* RC4_64_WITH_MD5 */ -#if 1 - { - 1, - SSL2_TXT_RC4_64_WITH_MD5, - SSL2_CK_RC4_64_WITH_MD5, - SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_MD5|SSL_SSLV2|SSL_LOW, - SSL2_CF_8_BYTE_ENC, - SSL_ALL_CIPHERS, - }, -#endif + { + 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_EXP | SSL_LOW, + SSL2_CF_8_BYTE_ENC, + 64, + 64, + }, +# endif + +# if 0 /* NULL SSLeay (testing) */ -#if 0 - { - 0, - SSL2_TXT_NULL, - SSL2_CK_NULL, - 0, - SSL_ALL_CIPHERS, - }, -#endif + { + 0, + SSL2_TXT_NULL, + SSL2_CK_NULL, + 0, + 0, + 0, + 0, + SSL_SSLV2, + SSL_STRONG_NONE, + 0, + 0, + 0, + }, +# endif /* end of list :-) */ - }; - -static SSL_METHOD SSLv2_data= { - SSL2_VERSION, - ssl2_new, /* local */ - ssl2_clear, /* local */ - ssl2_free, /* local */ - ssl_undefined_function, - ssl_undefined_function, - ssl2_read, - ssl2_peek, - ssl2_write, - ssl2_shutdown, - ssl_ok, /* NULL - renegotiate */ - ssl_ok, /* NULL - check renegotiate */ - ssl2_ctrl, /* local */ - ssl2_ctx_ctrl, /* local */ - ssl2_get_cipher_by_char, - ssl2_put_cipher_by_char, - ssl2_pending, - ssl2_num_ciphers, - ssl2_get_cipher, - ssl_bad_method, - ssl2_default_timeout, - &ssl3_undef_enc_method, - }; - -static long ssl2_default_timeout() - { - return(300); - } - -SSL_METHOD *sslv2_base_method() - { - return(&SSLv2_data); - } - -int ssl2_num_ciphers() - { - return(SSL2_NUM_CIPHERS); - } - -SSL_CIPHER *ssl2_get_cipher(u) -unsigned int u; - { - if (u < SSL2_NUM_CIPHERS) - return(&(ssl2_ciphers[SSL2_NUM_CIPHERS-1-u])); - else - return(NULL); - } - -int ssl2_pending(s) -SSL *s; - { - return(s->s2->ract_data_length); - } - -int ssl2_new(s) -SSL *s; - { - SSL2_CTX *s2; - - if ((s2=(SSL2_CTX *)Malloc(sizeof(SSL2_CTX))) == NULL) goto err; - memset(s2,0,sizeof(SSL2_CTX)); - - if ((s2->rbuf=(unsigned char *)Malloc( - SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER+2)) == NULL) goto err; - if ((s2->wbuf=(unsigned char *)Malloc( - SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER+2)) == NULL) goto err; - s->s2=s2; - - ssl2_clear(s); - return(1); -err: - if (s2 != NULL) - { - if (s2->wbuf != NULL) Free(s2->wbuf); - if (s2->rbuf != NULL) Free(s2->rbuf); - Free(s2); - } - return(0); - } - -void ssl2_free(s) -SSL *s; - { - SSL2_CTX *s2; - - if(s == NULL) - return; - - s2=s->s2; - if (s2->rbuf != NULL) Free(s2->rbuf); - if (s2->wbuf != NULL) Free(s2->wbuf); - memset(s2,0,sizeof(SSL2_CTX)); - Free(s2); - s->s2=NULL; - } - -void ssl2_clear(s) -SSL *s; - { - SSL2_CTX *s2; - unsigned char *rbuf,*wbuf; - - s2=s->s2; - - rbuf=s2->rbuf; - wbuf=s2->wbuf; - - memset(s2,0,sizeof(SSL2_CTX)); - - 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(s,cmd,larg,parg) -SSL *s; -int cmd; -long larg; -char *parg; - { - int ret=0; - - switch(cmd) - { - case SSL_CTRL_GET_SESSION_REUSED: - ret=s->hit; - break; - default: - break; - } - return(ret); - } - -long ssl2_ctx_ctrl(ctx,cmd,larg,parg) -SSL_CTX *ctx; -int cmd; -long larg; -char *parg; - { - return(0); - } - -/* This function needs to check if the ciphers required are actually - * available */ -SSL_CIPHER *ssl2_get_cipher_by_char(p) -const unsigned char *p; - { - static int init=1; - static SSL_CIPHER *sorted[SSL2_NUM_CIPHERS]; - SSL_CIPHER c,*cp= &c,**cpp; - unsigned long id; - int i; - - if (init) - { - init=0; - - for (i=0; ivalid) - return(NULL); - else - return(*cpp); - } - -int ssl2_put_cipher_by_char(c,p) -const SSL_CIPHER *c; -unsigned char *p; - { - long l; - - if (p != NULL) - { - l=c->id; - if ((l & 0xff000000) != 0x02000000) return(0); - p[0]=((unsigned char)(l>>16L))&0xFF; - p[1]=((unsigned char)(l>> 8L))&0xFF; - p[2]=((unsigned char)(l ))&0xFF; - } - return(3); - } - -void ssl2_generate_key_material(s) -SSL *s; - { - unsigned int i; - MD5_CTX ctx; - unsigned char *km; - unsigned char c='0'; - - km=s->s2->key_material; - for (i=0; is2->key_material_length; i+=MD5_DIGEST_LENGTH) - { - MD5_Init(&ctx); - - MD5_Update(&ctx,s->session->master_key,s->session->master_key_length); - MD5_Update(&ctx,(unsigned char *)&c,1); - c++; - MD5_Update(&ctx,s->s2->challenge,s->s2->challenge_length); - MD5_Update(&ctx,s->s2->conn_id,s->s2->conn_id_length); - MD5_Final(km,&ctx); - km+=MD5_DIGEST_LENGTH; - } - } - -void ssl2_return_error(s,err) -SSL *s; -int err; - { - if (!s->error) - { - s->error=3; - s->error_code=err; - - ssl2_write_error(s); - } - } - - -void ssl2_write_error(s) -SSL *s; - { - 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; - s->error=0; - i=ssl2_write(s,&(buf[3-error]),error); -/* if (i == error) s->rwstate=state; */ - - if (i < 0) - s->error=error; - else if (i != s->error) - s->error=error-i; - /* else - s->error=0; */ - } - -int ssl2_shutdown(s) -SSL *s; - { - s->shutdown=(SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN); - return(1); - } +}; + +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); + if ((cp == NULL) || (cp->valid == 0)) + return NULL; + else + 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