1 /* crypto/asn1/a_sign.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
61 #include <sys/types.h>
71 int ASN1_sign(i2d,algor1,algor2,signature,data,pkey,type)
75 ASN1_BIT_STRING *signature;
81 unsigned char *p,*buf_in=NULL,*buf_out=NULL;
82 int i,inl=0,outl=0,outll=0;
91 if (a == NULL) continue;
92 if ( (a->parameter == NULL) ||
93 (a->parameter->type != V_ASN1_NULL))
95 ASN1_TYPE_free(a->parameter);
96 if ((a->parameter=ASN1_TYPE_new()) == NULL) goto err;
97 a->parameter->type=V_ASN1_NULL;
99 ASN1_OBJECT_free(a->algorithm);
100 a->algorithm=OBJ_nid2obj(type->pkey_type);
101 if (a->algorithm == NULL)
103 ASN1err(ASN1_F_ASN1_SIGN,ASN1_R_UNKNOWN_OBJECT_TYPE);
106 if (a->algorithm->length == 0)
108 ASN1err(ASN1_F_ASN1_SIGN,ASN1_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD);
113 buf_in=(unsigned char *)Malloc((unsigned int)inl);
114 outll=outl=EVP_PKEY_size(pkey);
115 buf_out=(unsigned char *)Malloc((unsigned int)outl);
116 if ((buf_in == NULL) || (buf_out == NULL))
119 ASN1err(ASN1_F_ASN1_SIGN,ERR_R_MALLOC_FAILURE);
125 EVP_SignInit(&ctx,type);
126 EVP_SignUpdate(&ctx,(unsigned char *)buf_in,inl);
127 if (!EVP_SignFinal(&ctx,(unsigned char *)buf_out,
128 (unsigned int *)&outl,pkey))
131 ASN1err(ASN1_F_ASN1_SIGN,ERR_R_EVP_LIB);
134 if (signature->data != NULL) Free((char *)signature->data);
135 signature->data=buf_out;
137 signature->length=outl;
138 /* In the interests of compatability, I'll make sure that
139 * the bit string has a 'not-used bits' value of 0
141 signature->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
142 signature->flags|=ASN1_STRING_FLAG_BITS_LEFT;
144 memset(&ctx,0,sizeof(ctx));
146 { memset((char *)buf_in,0,(unsigned int)inl); Free((char *)buf_in); }
148 { memset((char *)buf_out,0,outll); Free((char *)buf_out); }