1*0Sstevel@tonic-gate /* crypto/rsa/rsa_saos.c */ 2*0Sstevel@tonic-gate /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3*0Sstevel@tonic-gate * All rights reserved. 4*0Sstevel@tonic-gate * 5*0Sstevel@tonic-gate * This package is an SSL implementation written 6*0Sstevel@tonic-gate * by Eric Young (eay@cryptsoft.com). 7*0Sstevel@tonic-gate * The implementation was written so as to conform with Netscapes SSL. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * This library is free for commercial and non-commercial use as long as 10*0Sstevel@tonic-gate * the following conditions are aheared to. The following conditions 11*0Sstevel@tonic-gate * apply to all code found in this distribution, be it the RC4, RSA, 12*0Sstevel@tonic-gate * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13*0Sstevel@tonic-gate * included with this distribution is covered by the same copyright terms 14*0Sstevel@tonic-gate * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15*0Sstevel@tonic-gate * 16*0Sstevel@tonic-gate * Copyright remains Eric Young's, and as such any Copyright notices in 17*0Sstevel@tonic-gate * the code are not to be removed. 18*0Sstevel@tonic-gate * If this package is used in a product, Eric Young should be given attribution 19*0Sstevel@tonic-gate * as the author of the parts of the library used. 20*0Sstevel@tonic-gate * This can be in the form of a textual message at program startup or 21*0Sstevel@tonic-gate * in documentation (online or textual) provided with the package. 22*0Sstevel@tonic-gate * 23*0Sstevel@tonic-gate * Redistribution and use in source and binary forms, with or without 24*0Sstevel@tonic-gate * modification, are permitted provided that the following conditions 25*0Sstevel@tonic-gate * are met: 26*0Sstevel@tonic-gate * 1. Redistributions of source code must retain the copyright 27*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer. 28*0Sstevel@tonic-gate * 2. Redistributions in binary form must reproduce the above copyright 29*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer in the 30*0Sstevel@tonic-gate * documentation and/or other materials provided with the distribution. 31*0Sstevel@tonic-gate * 3. All advertising materials mentioning features or use of this software 32*0Sstevel@tonic-gate * must display the following acknowledgement: 33*0Sstevel@tonic-gate * "This product includes cryptographic software written by 34*0Sstevel@tonic-gate * Eric Young (eay@cryptsoft.com)" 35*0Sstevel@tonic-gate * The word 'cryptographic' can be left out if the rouines from the library 36*0Sstevel@tonic-gate * being used are not cryptographic related :-). 37*0Sstevel@tonic-gate * 4. If you include any Windows specific code (or a derivative thereof) from 38*0Sstevel@tonic-gate * the apps directory (application code) you must include an acknowledgement: 39*0Sstevel@tonic-gate * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40*0Sstevel@tonic-gate * 41*0Sstevel@tonic-gate * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42*0Sstevel@tonic-gate * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43*0Sstevel@tonic-gate * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44*0Sstevel@tonic-gate * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45*0Sstevel@tonic-gate * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46*0Sstevel@tonic-gate * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47*0Sstevel@tonic-gate * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48*0Sstevel@tonic-gate * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49*0Sstevel@tonic-gate * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50*0Sstevel@tonic-gate * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51*0Sstevel@tonic-gate * SUCH DAMAGE. 52*0Sstevel@tonic-gate * 53*0Sstevel@tonic-gate * The licence and distribution terms for any publically available version or 54*0Sstevel@tonic-gate * derivative of this code cannot be changed. i.e. this code cannot simply be 55*0Sstevel@tonic-gate * copied and put under another distribution licence 56*0Sstevel@tonic-gate * [including the GNU Public Licence.] 57*0Sstevel@tonic-gate */ 58*0Sstevel@tonic-gate 59*0Sstevel@tonic-gate #include <stdio.h> 60*0Sstevel@tonic-gate #include "cryptlib.h" 61*0Sstevel@tonic-gate #include <openssl/bn.h> 62*0Sstevel@tonic-gate #include <openssl/rsa.h> 63*0Sstevel@tonic-gate #include <openssl/objects.h> 64*0Sstevel@tonic-gate #include <openssl/x509.h> 65*0Sstevel@tonic-gate 66*0Sstevel@tonic-gate int RSA_sign_ASN1_OCTET_STRING(int type, 67*0Sstevel@tonic-gate const unsigned char *m, unsigned int m_len, 68*0Sstevel@tonic-gate unsigned char *sigret, unsigned int *siglen, RSA *rsa) 69*0Sstevel@tonic-gate { 70*0Sstevel@tonic-gate ASN1_OCTET_STRING sig; 71*0Sstevel@tonic-gate int i,j,ret=1; 72*0Sstevel@tonic-gate unsigned char *p,*s; 73*0Sstevel@tonic-gate 74*0Sstevel@tonic-gate sig.type=V_ASN1_OCTET_STRING; 75*0Sstevel@tonic-gate sig.length=m_len; 76*0Sstevel@tonic-gate sig.data=(unsigned char *)m; 77*0Sstevel@tonic-gate 78*0Sstevel@tonic-gate i=i2d_ASN1_OCTET_STRING(&sig,NULL); 79*0Sstevel@tonic-gate j=RSA_size(rsa); 80*0Sstevel@tonic-gate if (i > (j-RSA_PKCS1_PADDING_SIZE)) 81*0Sstevel@tonic-gate { 82*0Sstevel@tonic-gate RSAerr(RSA_F_RSA_SIGN_ASN1_OCTET_STRING,RSA_R_DIGEST_TOO_BIG_FOR_RSA_KEY); 83*0Sstevel@tonic-gate return(0); 84*0Sstevel@tonic-gate } 85*0Sstevel@tonic-gate s=(unsigned char *)OPENSSL_malloc((unsigned int)j+1); 86*0Sstevel@tonic-gate if (s == NULL) 87*0Sstevel@tonic-gate { 88*0Sstevel@tonic-gate RSAerr(RSA_F_RSA_SIGN_ASN1_OCTET_STRING,ERR_R_MALLOC_FAILURE); 89*0Sstevel@tonic-gate return(0); 90*0Sstevel@tonic-gate } 91*0Sstevel@tonic-gate p=s; 92*0Sstevel@tonic-gate i2d_ASN1_OCTET_STRING(&sig,&p); 93*0Sstevel@tonic-gate i=RSA_private_encrypt(i,s,sigret,rsa,RSA_PKCS1_PADDING); 94*0Sstevel@tonic-gate if (i <= 0) 95*0Sstevel@tonic-gate ret=0; 96*0Sstevel@tonic-gate else 97*0Sstevel@tonic-gate *siglen=i; 98*0Sstevel@tonic-gate 99*0Sstevel@tonic-gate OPENSSL_cleanse(s,(unsigned int)j+1); 100*0Sstevel@tonic-gate OPENSSL_free(s); 101*0Sstevel@tonic-gate return(ret); 102*0Sstevel@tonic-gate } 103*0Sstevel@tonic-gate 104*0Sstevel@tonic-gate int RSA_verify_ASN1_OCTET_STRING(int dtype, 105*0Sstevel@tonic-gate const unsigned char *m, 106*0Sstevel@tonic-gate unsigned int m_len, unsigned char *sigbuf, unsigned int siglen, 107*0Sstevel@tonic-gate RSA *rsa) 108*0Sstevel@tonic-gate { 109*0Sstevel@tonic-gate int i,ret=0; 110*0Sstevel@tonic-gate unsigned char *p,*s; 111*0Sstevel@tonic-gate ASN1_OCTET_STRING *sig=NULL; 112*0Sstevel@tonic-gate 113*0Sstevel@tonic-gate if (siglen != (unsigned int)RSA_size(rsa)) 114*0Sstevel@tonic-gate { 115*0Sstevel@tonic-gate RSAerr(RSA_F_RSA_VERIFY_ASN1_OCTET_STRING,RSA_R_WRONG_SIGNATURE_LENGTH); 116*0Sstevel@tonic-gate return(0); 117*0Sstevel@tonic-gate } 118*0Sstevel@tonic-gate 119*0Sstevel@tonic-gate s=(unsigned char *)OPENSSL_malloc((unsigned int)siglen); 120*0Sstevel@tonic-gate if (s == NULL) 121*0Sstevel@tonic-gate { 122*0Sstevel@tonic-gate RSAerr(RSA_F_RSA_VERIFY_ASN1_OCTET_STRING,ERR_R_MALLOC_FAILURE); 123*0Sstevel@tonic-gate goto err; 124*0Sstevel@tonic-gate } 125*0Sstevel@tonic-gate i=RSA_public_decrypt((int)siglen,sigbuf,s,rsa,RSA_PKCS1_PADDING); 126*0Sstevel@tonic-gate 127*0Sstevel@tonic-gate if (i <= 0) goto err; 128*0Sstevel@tonic-gate 129*0Sstevel@tonic-gate p=s; 130*0Sstevel@tonic-gate sig=d2i_ASN1_OCTET_STRING(NULL,&p,(long)i); 131*0Sstevel@tonic-gate if (sig == NULL) goto err; 132*0Sstevel@tonic-gate 133*0Sstevel@tonic-gate if ( ((unsigned int)sig->length != m_len) || 134*0Sstevel@tonic-gate (memcmp(m,sig->data,m_len) != 0)) 135*0Sstevel@tonic-gate { 136*0Sstevel@tonic-gate RSAerr(RSA_F_RSA_VERIFY_ASN1_OCTET_STRING,RSA_R_BAD_SIGNATURE); 137*0Sstevel@tonic-gate } 138*0Sstevel@tonic-gate else 139*0Sstevel@tonic-gate ret=1; 140*0Sstevel@tonic-gate err: 141*0Sstevel@tonic-gate if (sig != NULL) M_ASN1_OCTET_STRING_free(sig); 142*0Sstevel@tonic-gate OPENSSL_cleanse(s,(unsigned int)siglen); 143*0Sstevel@tonic-gate OPENSSL_free(s); 144*0Sstevel@tonic-gate return(ret); 145*0Sstevel@tonic-gate } 146*0Sstevel@tonic-gate 147