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Diffstat (limited to 'crypto/dsa/dsa_lib.c')
| -rw-r--r-- | crypto/dsa/dsa_lib.c | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/crypto/dsa/dsa_lib.c b/crypto/dsa/dsa_lib.c new file mode 100644 index 0000000000..e666db07f0 --- /dev/null +++ b/crypto/dsa/dsa_lib.c @@ -0,0 +1,142 @@ +/* crypto/dsa/dsa_lib.c */ +/* Copyright (C) 1995-1997 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.] + */ + +/* Origional version from Steven Schoch <schoch@sheba.arc.nasa.gov> */ + +#include <stdio.h> +#include "cryptlib.h" +#include "bn.h" +#include "dsa.h" +#include "asn1.h" + +char *DSA_version="\0DSA part of SSLeay 0.8.1b 29-Jun-1998"; + +DSA *DSA_new() + { + DSA *ret; + + ret=(DSA *)Malloc(sizeof(DSA)); + if (ret == NULL) + { + DSAerr(DSA_F_DSA_NEW,ERR_R_MALLOC_FAILURE); + return(NULL); + } + ret->pad=0; + ret->version=0; + ret->write_params=1; + ret->p=NULL; + ret->q=NULL; + ret->g=NULL; + + ret->pub_key=NULL; + ret->priv_key=NULL; + + ret->kinv=NULL; + ret->r=NULL; + + ret->references=1; + return(ret); + } + +void DSA_free(r) +DSA *r; + { + int i; + + if (r == NULL) return; + + i=CRYPTO_add(&r->references,-1,CRYPTO_LOCK_DSA); + if (i > 0) return; +#ifdef REF_CHECK + if (i < 0) + { + fprintf(stderr,"DSA_free, bad reference count\n"); + abort(); + } +#endif + + if (r->p != NULL) BN_clear_free(r->p); + if (r->q != NULL) BN_clear_free(r->q); + if (r->g != NULL) BN_clear_free(r->g); + if (r->pub_key != NULL) BN_clear_free(r->pub_key); + if (r->priv_key != NULL) BN_clear_free(r->priv_key); + if (r->kinv != NULL) BN_clear_free(r->kinv); + if (r->r != NULL) BN_clear_free(r->r); + Free(r); + } + +int DSA_size(r) +DSA *r; + { + int ret,i; + ASN1_INTEGER bs; + unsigned char buf[4]; + + i=BN_num_bits(r->q); + bs.length=(i+7)/8; + bs.data=buf; + bs.type=V_ASN1_INTEGER; + /* If the top bit is set the asn1 encoding is 1 larger. */ + buf[0]=0xff; + + i=i2d_ASN1_INTEGER(&bs,NULL); + i+=i; /* r and s */ + ret=ASN1_object_size(1,i,V_ASN1_SEQUENCE); + return(ret); + } + |