DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Header

Mercurial (31ec81b5d7bb)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "secdig.h"

#include "secoid.h"
#include "secasn1.h" 
#include "secerr.h"

/*
 * XXX Want to have a SGN_DecodeDigestInfo, like:
 *	SGNDigestInfo *SGN_DecodeDigestInfo(SECItem *didata);
 * that creates a pool and allocates from it and decodes didata into
 * the newly allocated DigestInfo structure.  Then fix secvfy.c (it
 * will no longer need an arena itself) to call this and then call
 * DestroyDigestInfo when it is done, then can remove the old template
 * above and keep our new template static and "hidden".
 */

/*
 * XXX It might be nice to combine the following two functions (create
 * and encode).  I think that is all anybody ever wants to do anyway.
 */

SECItem *
SGN_EncodeDigestInfo(PLArenaPool *poolp, SECItem *dest, SGNDigestInfo *diginfo)
{
    return SEC_ASN1EncodeItem (poolp, dest, diginfo, sgn_DigestInfoTemplate);
}

SGNDigestInfo *
SGN_CreateDigestInfo(SECOidTag algorithm, const unsigned char *sig,
                     unsigned len)
{
    SGNDigestInfo *di;
    SECStatus rv;
    PLArenaPool *arena;
    SECItem *null_param;
    SECItem dummy_value;

    switch (algorithm) {
      case SEC_OID_MD2:
      case SEC_OID_MD5:
      case SEC_OID_SHA1:
      case SEC_OID_SHA224:
      case SEC_OID_SHA256:
      case SEC_OID_SHA384:
      case SEC_OID_SHA512:
	break;
      default:
	PORT_SetError(SEC_ERROR_INVALID_ALGORITHM);
	return NULL;
    }

    arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
    if (arena == NULL) {
	return NULL;
    }

    di = (SGNDigestInfo *) PORT_ArenaZAlloc(arena, sizeof(SGNDigestInfo));
    if (di == NULL) {
	PORT_FreeArena(arena, PR_FALSE);
	return NULL;
    }

    di->arena = arena;

    /*
     * PKCS #1 specifies that the AlgorithmID must have a NULL parameter
     * (as opposed to no parameter at all).
     */
    dummy_value.data = NULL;
    dummy_value.len = 0;
    null_param = SEC_ASN1EncodeItem(NULL, NULL, &dummy_value, SEC_NullTemplate);
    if (null_param == NULL) {
	goto loser;
    }

    rv = SECOID_SetAlgorithmID(arena, &di->digestAlgorithm, algorithm,
			       null_param);

    SECITEM_FreeItem(null_param, PR_TRUE);

    if (rv != SECSuccess) {
	goto loser;
    }

    di->digest.data = (unsigned char *) PORT_ArenaAlloc(arena, len);
    if (di->digest.data == NULL) {
	goto loser;
    }

    di->digest.len = len;
    PORT_Memcpy(di->digest.data, sig, len);
    return di;

  loser:
    SGN_DestroyDigestInfo(di);
    return NULL;
}

SGNDigestInfo *
SGN_DecodeDigestInfo(SECItem *didata)
{
    PLArenaPool *arena;
    SGNDigestInfo *di;
    SECStatus rv = SECFailure;
    SECItem      diCopy   = {siBuffer, NULL, 0};

    arena = PORT_NewArena(SEC_ASN1_DEFAULT_ARENA_SIZE);
    if(arena == NULL)
	return NULL;

    rv = SECITEM_CopyItem(arena, &diCopy, didata);
    if (rv != SECSuccess) {
	PORT_FreeArena(arena, PR_FALSE);
    	return NULL;
    }

    di = (SGNDigestInfo *)PORT_ArenaZAlloc(arena, sizeof(SGNDigestInfo));
    if (di != NULL) {
	di->arena = arena;
	rv = SEC_QuickDERDecodeItem(arena, di, sgn_DigestInfoTemplate, &diCopy);
    }
	
    if ((di == NULL) || (rv != SECSuccess)) {
	PORT_FreeArena(arena, PR_FALSE);
	di = NULL;
    }

    return di;
}

void
SGN_DestroyDigestInfo(SGNDigestInfo *di)
{
    if (di && di->arena) {
	PORT_FreeArena(di->arena, PR_FALSE);
    }

    return;
}

SECStatus 
SGN_CopyDigestInfo(PLArenaPool *poolp, SGNDigestInfo *a, SGNDigestInfo *b)
{
    SECStatus rv;
    void *mark;

    if((poolp == NULL) || (a == NULL) || (b == NULL))
	return SECFailure;

    mark = PORT_ArenaMark(poolp);
    a->arena = poolp;
    rv = SECOID_CopyAlgorithmID(poolp, &a->digestAlgorithm, 
	&b->digestAlgorithm);
    if (rv == SECSuccess)
	rv = SECITEM_CopyItem(poolp, &a->digest, &b->digest);

    if (rv != SECSuccess) {
	PORT_ArenaRelease(poolp, mark);
    } else {
	PORT_ArenaUnmark(poolp, mark);
    }

    return rv;
}

SECComparison
SGN_CompareDigestInfo(SGNDigestInfo *a, SGNDigestInfo *b)
{
    SECComparison rv;

    /* Check signature algorithm's */
    rv = SECOID_CompareAlgorithmID(&a->digestAlgorithm, &b->digestAlgorithm);
    if (rv) return rv;

    /* Compare signature block length's */
    rv = SECITEM_CompareItem(&a->digest, &b->digest);
    return rv;
}