code / widevine-mirrored-source / 66427ffa50c9a1038998509907e91d0be9ced12a / . / openssl-1.0.0a / crypto / rsa / rsa_saos.c

/* crypto/rsa/rsa_saos.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.] | |

*/ | |

#include <stdio.h> | |

#include "cryptlib.h" | |

#include <openssl/bn.h> | |

#include <openssl/rsa.h> | |

#include <openssl/objects.h> | |

#include <openssl/x509.h> | |

int RSA_sign_ASN1_OCTET_STRING(int type, | |

const unsigned char *m, unsigned int m_len, | |

unsigned char *sigret, unsigned int *siglen, RSA *rsa) | |

{ | |

ASN1_OCTET_STRING sig; | |

int i,j,ret=1; | |

unsigned char *p,*s; | |

sig.type=V_ASN1_OCTET_STRING; | |

sig.length=m_len; | |

sig.data=(unsigned char *)m; | |

i=i2d_ASN1_OCTET_STRING(&sig,NULL); | |

j=RSA_size(rsa); | |

if (i > (j-RSA_PKCS1_PADDING_SIZE)) | |

{ | |

RSAerr(RSA_F_RSA_SIGN_ASN1_OCTET_STRING,RSA_R_DIGEST_TOO_BIG_FOR_RSA_KEY); | |

return(0); | |

} | |

s=(unsigned char *)OPENSSL_malloc((unsigned int)j+1); | |

if (s == NULL) | |

{ | |

RSAerr(RSA_F_RSA_SIGN_ASN1_OCTET_STRING,ERR_R_MALLOC_FAILURE); | |

return(0); | |

} | |

p=s; | |

i2d_ASN1_OCTET_STRING(&sig,&p); | |

i=RSA_private_encrypt(i,s,sigret,rsa,RSA_PKCS1_PADDING); | |

if (i <= 0) | |

ret=0; | |

else | |

*siglen=i; | |

OPENSSL_cleanse(s,(unsigned int)j+1); | |

OPENSSL_free(s); | |

return(ret); | |

} | |

int RSA_verify_ASN1_OCTET_STRING(int dtype, | |

const unsigned char *m, | |

unsigned int m_len, unsigned char *sigbuf, unsigned int siglen, | |

RSA *rsa) | |

{ | |

int i,ret=0; | |

unsigned char *s; | |

const unsigned char *p; | |

ASN1_OCTET_STRING *sig=NULL; | |

if (siglen != (unsigned int)RSA_size(rsa)) | |

{ | |

RSAerr(RSA_F_RSA_VERIFY_ASN1_OCTET_STRING,RSA_R_WRONG_SIGNATURE_LENGTH); | |

return(0); | |

} | |

s=(unsigned char *)OPENSSL_malloc((unsigned int)siglen); | |

if (s == NULL) | |

{ | |

RSAerr(RSA_F_RSA_VERIFY_ASN1_OCTET_STRING,ERR_R_MALLOC_FAILURE); | |

goto err; | |

} | |

i=RSA_public_decrypt((int)siglen,sigbuf,s,rsa,RSA_PKCS1_PADDING); | |

if (i <= 0) goto err; | |

p=s; | |

sig=d2i_ASN1_OCTET_STRING(NULL,&p,(long)i); | |

if (sig == NULL) goto err; | |

if ( ((unsigned int)sig->length != m_len) || | |

(memcmp(m,sig->data,m_len) != 0)) | |

{ | |

RSAerr(RSA_F_RSA_VERIFY_ASN1_OCTET_STRING,RSA_R_BAD_SIGNATURE); | |

} | |

else | |

ret=1; | |

err: | |

if (sig != NULL) M_ASN1_OCTET_STRING_free(sig); | |

if (s != NULL) | |

{ | |

OPENSSL_cleanse(s,(unsigned int)siglen); | |

OPENSSL_free(s); | |

} | |

return(ret); | |

} | |