diff options
Diffstat (limited to 'crypto/asn1/i2d_dhp.c')
| -rw-r--r-- | crypto/asn1/i2d_dhp.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/crypto/asn1/i2d_dhp.c b/crypto/asn1/i2d_dhp.c new file mode 100644 index 000000000..087b6b8f6 --- /dev/null +++ b/crypto/asn1/i2d_dhp.c @@ -0,0 +1,128 @@ +/* crypto/asn1/i2d_dhp.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.] + */ + +#include <stdio.h> +#include "cryptlib.h" +#include "bn.h" +#include "asn1_mac.h" +#include "dh.h" + +/* + * ASN1err(ASN1_F_D2I_DHPARAMS,ASN1_R_LENGTH_MISMATCH); + * ASN1err(ASN1_F_X509_DHPARAMS_NEW,ASN1_R_LENGTH_MISMATCH); + */ + +int i2d_DHparams(a,pp) +DH *a; +unsigned char **pp; + { + BIGNUM *num[3]; + ASN1_INTEGER bs; + unsigned int j,i,tot=0,len,max=0; + int t,ret= -1; + unsigned char *p; + + if (a == NULL) return(0); + num[0]=a->p; + num[1]=a->g; + if (a->length != 0) + { + if ((num[2]=BN_new()) == NULL) goto err; + if (!BN_set_word(num[2],a->length)) goto err; + } + else + num[2]=NULL; + + for (i=0; i<3; i++) + { + if (num[i] == NULL) continue; + j=BN_num_bits(num[i]); + len=((j == 0)?0:((j/8)+1)); + if (len > max) max=len; + len=ASN1_object_size(0,len, + (num[i]->neg)?V_ASN1_NEG_INTEGER:V_ASN1_INTEGER); + tot+=len; + } + + t=ASN1_object_size(1,tot,V_ASN1_SEQUENCE); + if (pp == NULL) return(t); + + p= *pp; + ASN1_put_object(&p,1,tot,V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL); + + bs.type=V_ASN1_INTEGER; + bs.data=(unsigned char *)Malloc(max+4); + if (bs.data == NULL) + { + ASN1err(ASN1_F_I2D_DHPARAMS,ERR_R_MALLOC_FAILURE); + goto err; + } + + for (i=0; i<3; i++) + { + if (num[i] == NULL) continue; + bs.length=BN_bn2bin(num[i],bs.data); + i2d_ASN1_INTEGER(&bs,&p); + } + Free((char *)bs.data); + ret=t; +err: + if (num[2] != NULL) BN_free(num[2]); + *pp=p; + return(ret); + } |