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Diffstat (limited to 'security/nss/lib/cryptohi/dsautil.c')
-rw-r--r--security/nss/lib/cryptohi/dsautil.c229
1 files changed, 0 insertions, 229 deletions
diff --git a/security/nss/lib/cryptohi/dsautil.c b/security/nss/lib/cryptohi/dsautil.c
deleted file mode 100644
index ed6f9cec8..000000000
--- a/security/nss/lib/cryptohi/dsautil.c
+++ /dev/null
@@ -1,229 +0,0 @@
-/*
- * The contents of this file are subject to the Mozilla Public
- * License Version 1.1 (the "License"); you may not use this file
- * except in compliance with the License. You may obtain a copy of
- * the License at http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS
- * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- * implied. See the License for the specific language governing
- * rights and limitations under the License.
- *
- * The Original Code is the Netscape security libraries.
- *
- * The Initial Developer of the Original Code is Netscape
- * Communications Corporation. Portions created by Netscape are
- * Copyright (C) 1994-2000 Netscape Communications Corporation. All
- * Rights Reserved.
- *
- * Contributor(s):
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL"), in which case the provisions of the GPL are applicable
- * instead of those above. If you wish to allow use of your
- * version of this file only under the terms of the GPL and not to
- * allow others to use your version of this file under the MPL,
- * indicate your decision by deleting the provisions above and
- * replace them with the notice and other provisions required by
- * the GPL. If you do not delete the provisions above, a recipient
- * may use your version of this file under either the MPL or the
- * GPL.
- */
-#include "secasn1.h"
-#include "secitem.h"
-#include "prerr.h"
-
-#ifndef DSA_SUBPRIME_LEN
-#define DSA_SUBPRIME_LEN 20 /* bytes */
-#endif
-
-typedef struct {
- SECItem r;
- SECItem s;
-} DSA_ASN1Signature;
-
-const SEC_ASN1Template DSA_SignatureTemplate[] =
-{
- { SEC_ASN1_SEQUENCE, 0, NULL, sizeof(DSA_ASN1Signature) },
- { SEC_ASN1_INTEGER, offsetof(DSA_ASN1Signature,r) },
- { SEC_ASN1_INTEGER, offsetof(DSA_ASN1Signature,s) },
- { 0, }
-};
-
-/* Input is variable length multi-byte integer, MSB first (big endian).
-** Most signficant bit of first byte is NOT treated as a sign bit.
-** May be one or more leading bytes of zeros.
-** Output is variable length multi-byte integer, MSB first (big endian).
-** Most significant bit of first byte will be zero (positive sign bit)
-** No more than one leading zero byte.
-** Caller supplies dest buffer, and assures that it is long enough,
-** e.g. at least one byte longer that src's buffer.
-*/
-void
-DSAU_ConvertUnsignedToSigned(SECItem *dest, SECItem *src)
-{
- unsigned char *pSrc = src->data;
- unsigned char *pDst = dest->data;
- unsigned int cntSrc = src->len;
- unsigned int cntDst = dest->len;
- unsigned char c;
-
- /* skip any leading zeros. */
- while (cntSrc && !(c = *pSrc)) {
- pSrc++;
- cntSrc--;
- }
- if (!cntSrc) {
- *pDst = 0;
- dest->len = 1;
- return;
- }
-
- if (c & 0x80)
- *pDst++ = 0;
-
- PORT_Memcpy(pDst, pSrc, cntSrc);
- dest->len = (pDst - dest->data) + cntSrc;
-}
-
-/*
-** src is a buffer holding a signed variable length integer.
-** dest is a buffer which will be filled with an unsigned integer,
-** MSB first (big endian) with leading zeros, so that the last byte
-** of src will be the LSB of the integer. The result will be exactly
-** the length specified by the caller in dest->len.
-** src can be shorter than dest. src can be longer than dst, but only
-** if the extra leading bytes are zeros.
-*/
-SECStatus
-DSAU_ConvertSignedToFixedUnsigned(SECItem *dest, SECItem *src)
-{
- unsigned char *pSrc = src->data;
- unsigned char *pDst = dest->data;
- unsigned int cntSrc = src->len;
- unsigned int cntDst = dest->len;
- int zCount = cntDst - cntSrc;
-
- if (zCount > 0) {
- PORT_Memset(pDst, 0, zCount);
- PORT_Memcpy(pDst + zCount, pSrc, cntSrc);
- return SECSuccess;
- }
- if (zCount <= 0) {
- /* Source is longer than destination. Check for leading zeros. */
- while (zCount++ < 0) {
- if (*pSrc++ != 0)
- goto loser;
- }
- }
- PORT_Memcpy(pDst, pSrc, cntDst);
- return SECSuccess;
-
-loser:
- PORT_SetError( PR_INVALID_ARGUMENT_ERROR );
- return SECFailure;
-}
-
-/* src is a "raw" DSA signature, 20 bytes of r followed by 20 bytes of s.
-** dest is the signature DER encoded. ?
-*/
-SECStatus
-DSAU_EncodeDerSig(SECItem *dest, SECItem *src)
-{
- SECItem * item;
- SECItem srcItem;
- DSA_ASN1Signature sig;
- unsigned char signedR[DSA_SUBPRIME_LEN + 1];
- unsigned char signedS[DSA_SUBPRIME_LEN + 1];
-
- PORT_Memset(&sig, 0, sizeof(sig));
-
- PORT_Assert(src->len == 2 * DSA_SUBPRIME_LEN);
- if (src->len != 2 * DSA_SUBPRIME_LEN) {
- PORT_SetError( PR_INVALID_ARGUMENT_ERROR );
- return SECFailure;
- }
-
- /* Must convert r and s from "unsigned" integers to "signed" integers.
- ** If the high order bit of the first byte (MSB) is 1, then must
- ** prepend with leading zero.
- ** Must remove all but one leading zero byte from numbers.
- */
- sig.r.data = signedR;
- sig.r.len = sizeof signedR;
- sig.s.data = signedS;
- sig.s.len = sizeof signedR;
-
- srcItem.data = src->data;
- srcItem.len = DSA_SUBPRIME_LEN;
-
- DSAU_ConvertUnsignedToSigned(&sig.r, &srcItem);
- srcItem.data += DSA_SUBPRIME_LEN;
- DSAU_ConvertUnsignedToSigned(&sig.s, &srcItem);
-
- item = SEC_ASN1EncodeItem(NULL, dest, &sig, DSA_SignatureTemplate);
- if (item == NULL)
- return SECFailure;
-
- /* XXX leak item? */
- return SECSuccess;
-}
-
-/* src is a DER-encoded DSA signature.
-** Returns a newly-allocated SECItem structure, pointing at a newly allocated
-** buffer containing the "raw" DSA signature, which is 20 bytes of r,
-** followed by 20 bytes of s.
-*/
-SECItem *
-DSAU_DecodeDerSig(SECItem *item)
-{
- SECItem * result = NULL;
- SECStatus status;
- DSA_ASN1Signature sig;
- SECItem dst;
-
- PORT_Memset(&sig, 0, sizeof(sig));
-
- result = PORT_ZNew(SECItem);
- if (result == NULL)
- goto loser;
-
- result->len = 2 * DSA_SUBPRIME_LEN;
- result->data = (unsigned char*)PORT_Alloc(2 * DSA_SUBPRIME_LEN);
- if (result->data == NULL)
- goto loser;
-
- status = SEC_ASN1DecodeItem(NULL, &sig, DSA_SignatureTemplate, item);
- if (status != SECSuccess)
- goto loser;
-
- /* Convert sig.r and sig.s from variable length signed integers to
- ** fixed length unsigned integers.
- */
- dst.data = result->data;
- dst.len = DSA_SUBPRIME_LEN;
- status = DSAU_ConvertSignedToFixedUnsigned(&dst, &sig.r);
- if (status != SECSuccess)
- goto loser;
-
- dst.data += DSA_SUBPRIME_LEN;
- status = DSAU_ConvertSignedToFixedUnsigned(&dst, &sig.s);
- if (status != SECSuccess)
- goto loser;
-
-done:
- if (sig.r.data != NULL)
- PORT_Free(sig.r.data);
- if (sig.s.data != NULL)
- PORT_Free(sig.s.data);
-
- return result;
-
-loser:
- if (result != NULL) {
- SECITEM_FreeItem(result, PR_TRUE);
- result = NULL;
- }
- goto done;
-}
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