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authorcvs2hg <devnull@localhost>2008-01-25 15:07:15 +0000
committercvs2hg <devnull@localhost>2008-01-25 15:07:15 +0000
commit45a4edec1dce3e24f59a4cdac95bc9330d9f5206 (patch)
tree77f8dcdbacf302118e5366f6675da774365c4525 /security/nss/lib/cryptohi/secvfy.c
parent128fb9d0f7fe1f6b4021f156779eb98c8bb6b509 (diff)
downloadnss-hg-45a4edec1dce3e24f59a4cdac95bc9330d9f5206.tar.gz
fixup commit for tag 'NSSCKBI_1_65_RTM'NSSCKBI_1_65_RTM
Diffstat (limited to 'security/nss/lib/cryptohi/secvfy.c')
-rw-r--r--security/nss/lib/cryptohi/secvfy.c640
1 files changed, 0 insertions, 640 deletions
diff --git a/security/nss/lib/cryptohi/secvfy.c b/security/nss/lib/cryptohi/secvfy.c
deleted file mode 100644
index 94a0b3563..000000000
--- a/security/nss/lib/cryptohi/secvfy.c
+++ /dev/null
@@ -1,640 +0,0 @@
-/*
- * Verification stuff.
- *
- * ***** BEGIN LICENSE BLOCK *****
- * Version: MPL 1.1/GPL 2.0/LGPL 2.1
- *
- * 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 the Initial Developer are Copyright (C) 1994-2000
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- * Dr Vipul Gupta <vipul.gupta@sun.com>, Sun Microsystems Laboratories
- *
- * Alternatively, the contents of this file may be used under the terms of
- * either the GNU General Public License Version 2 or later (the "GPL"), or
- * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
- * in which case the provisions of the GPL or the LGPL are applicable instead
- * of those above. If you wish to allow use of your version of this file only
- * under the terms of either the GPL or the LGPL, and not to allow others to
- * use your version of this file under the terms of the MPL, indicate your
- * decision by deleting the provisions above and replace them with the notice
- * and other provisions required by the GPL or the LGPL. If you do not delete
- * the provisions above, a recipient may use your version of this file under
- * the terms of any one of the MPL, the GPL or the LGPL.
- *
- * ***** END LICENSE BLOCK ***** */
-/* $Id$ */
-
-#include <stdio.h>
-#include "cryptohi.h"
-#include "sechash.h"
-#include "keyhi.h"
-#include "secasn1.h"
-#include "secoid.h"
-#include "pk11func.h"
-#include "secdig.h"
-#include "secerr.h"
-#include "secport.h"
-
-/*
-** Decrypt signature block using public key
-** Store the hash algorithm oid tag in *tagp
-** Store the digest in the digest buffer
-** Store the digest length in *digestlen
-** XXX this is assuming that the signature algorithm has WITH_RSA_ENCRYPTION
-*/
-static SECStatus
-DecryptSigBlock(SECOidTag *tagp, unsigned char *digest,
- unsigned int *digestlen, unsigned int maxdigestlen,
- SECKEYPublicKey *key, const SECItem *sig, char *wincx)
-{
- SGNDigestInfo *di = NULL;
- unsigned char *buf = NULL;
- SECStatus rv;
- SECOidTag tag;
- SECItem it;
-
- if (key == NULL) goto loser;
-
- it.len = SECKEY_PublicKeyStrength(key);
- if (!it.len) goto loser;
- it.data = buf = (unsigned char *)PORT_Alloc(it.len);
- if (!buf) goto loser;
-
- /* decrypt the block */
- rv = PK11_VerifyRecover(key, (SECItem *)sig, &it, wincx);
- if (rv != SECSuccess) goto loser;
-
- di = SGN_DecodeDigestInfo(&it);
- if (di == NULL) goto sigloser;
-
- /*
- ** Finally we have the digest info; now we can extract the algorithm
- ** ID and the signature block
- */
- tag = SECOID_GetAlgorithmTag(&di->digestAlgorithm);
- /* Check that tag is an appropriate algorithm */
- if (tag == SEC_OID_UNKNOWN) {
- goto sigloser;
- }
- /* make sure the "parameters" are not too bogus. */
- if (di->digestAlgorithm.parameters.len > 2) {
- goto sigloser;
- }
- if (di->digest.len > maxdigestlen) {
- PORT_SetError(SEC_ERROR_OUTPUT_LEN);
- goto loser;
- }
- PORT_Memcpy(digest, di->digest.data, di->digest.len);
- *tagp = tag;
- *digestlen = di->digest.len;
- goto done;
-
- sigloser:
- PORT_SetError(SEC_ERROR_BAD_SIGNATURE);
-
- loser:
- rv = SECFailure;
-
- done:
- if (di != NULL) SGN_DestroyDigestInfo(di);
- if (buf != NULL) PORT_Free(buf);
-
- return rv;
-}
-
-typedef enum { VFY_RSA, VFY_DSA, VFY_ECDSA } VerifyType;
-
-struct VFYContextStr {
- SECOidTag alg; /* the hash algorithm */
- VerifyType type;
- SECKEYPublicKey *key;
- /*
- * This buffer holds either the digest or the full signature
- * depending on the type of the signature. It is defined as a
- * union to make sure it always has enough space.
- *
- * Use the "buffer" union member to reference the buffer.
- * Note: do not take the size of the "buffer" union member. Take
- * the size of the union or some other union member instead.
- */
- union {
- unsigned char buffer[1];
-
- /* the digest in the decrypted RSA signature */
- unsigned char rsadigest[HASH_LENGTH_MAX];
- /* the full DSA signature... 40 bytes */
- unsigned char dsasig[DSA_SIGNATURE_LEN];
- /* the full ECDSA signature */
- unsigned char ecdsasig[2 * MAX_ECKEY_LEN];
- } u;
- unsigned int rsadigestlen;
- void * wincx;
- void *hashcx;
- const SECHashObject *hashobj;
- SECOidTag sigAlg; /* the (composite) signature algorithm */
- PRBool hasSignature; /* true if the signature was provided in the
- * VFY_CreateContext call. If false, the
- * signature must be provided with a
- * VFY_EndWithSignature call. */
-};
-
-/*
- * decode the ECDSA or DSA signature from it's DER wrapping.
- * The unwrapped/raw signature is placed in the buffer pointed
- * to by dsig and has enough room for len bytes.
- */
-static SECStatus
-decodeECorDSASignature(SECOidTag algid, SECItem *sig, unsigned char *dsig,
- unsigned int len) {
- SECItem *dsasig = NULL; /* also used for ECDSA */
- SECStatus rv=SECSuccess;
-
- switch (algid) {
- case SEC_OID_ANSIX962_ECDSA_SHA1_SIGNATURE:
- case SEC_OID_ANSIX962_ECDSA_SHA256_SIGNATURE:
- case SEC_OID_ANSIX962_ECDSA_SHA384_SIGNATURE:
- case SEC_OID_ANSIX962_ECDSA_SHA512_SIGNATURE:
- case SEC_OID_ANSIX962_ECDSA_SIGNATURE_RECOMMENDED_DIGEST:
- case SEC_OID_ANSIX962_ECDSA_SIGNATURE_SPECIFIED_DIGEST:
- if (len > MAX_ECKEY_LEN * 2) {
- PORT_SetError(SEC_ERROR_BAD_DER);
- return SECFailure;
- }
- /* fall through */
- case SEC_OID_ANSIX9_DSA_SIGNATURE_WITH_SHA1_DIGEST:
- case SEC_OID_BOGUS_DSA_SIGNATURE_WITH_SHA1_DIGEST:
- case SEC_OID_ANSIX9_DSA_SIGNATURE:
- dsasig = DSAU_DecodeDerSigToLen(sig, len);
-
- if ((dsasig == NULL) || (dsasig->len != len)) {
- rv = SECFailure;
- } else {
- PORT_Memcpy(dsig, dsasig->data, dsasig->len);
- }
- break;
- default:
- if (sig->len != len) {
- rv = SECFailure;
- } else {
- PORT_Memcpy(dsig, sig->data, sig->len);
- }
- break;
- }
-
- if (dsasig != NULL) SECITEM_FreeItem(dsasig, PR_TRUE);
- if (rv == SECFailure) PORT_SetError(SEC_ERROR_BAD_DER);
- return rv;
-}
-
-const static SEC_ASN1Template hashParameterTemplate[] =
-{
- { SEC_ASN1_SEQUENCE, 0, NULL, sizeof(SECItem) },
- { SEC_ASN1_OBJECT_ID, 0 },
- { SEC_ASN1_SKIP_REST },
- { 0, }
-};
-/*
- * Pulls the hash algorithm, signing algorithm, and key type out of a
- * composite algorithm.
- *
- * alg: the composite algorithm to dissect.
- * hashalg: address of a SECOidTag which will be set with the hash algorithm.
- * params: specific signature parameter (from the signature AlgorithmID).
- * key: public key to verify against.
- * Returns: SECSuccess if the alg algorithm was acceptable, SECFailure if the
- * algorithm was not found or was not a signing algorithm.
- */
-static SECStatus
-decodeSigAlg(SECOidTag alg, const SECItem *params, const SECKEYPublicKey *key,
- SECOidTag *hashalg)
-{
- PRArenaPool *arena;
- SECStatus rv;
- SECItem oid;
- unsigned int len;
- PR_ASSERT(hashalg!=NULL);
-
- switch (alg) {
- /* We probably shouldn't be generating MD2 signatures either */
- case SEC_OID_PKCS1_MD2_WITH_RSA_ENCRYPTION:
- *hashalg = SEC_OID_MD2;
- break;
- case SEC_OID_PKCS1_MD5_WITH_RSA_ENCRYPTION:
- *hashalg = SEC_OID_MD5;
- break;
- case SEC_OID_PKCS1_SHA1_WITH_RSA_ENCRYPTION:
- case SEC_OID_ISO_SHA_WITH_RSA_SIGNATURE:
- *hashalg = SEC_OID_SHA1;
- break;
-
- case SEC_OID_ANSIX962_ECDSA_SHA256_SIGNATURE:
- case SEC_OID_PKCS1_SHA256_WITH_RSA_ENCRYPTION:
- *hashalg = SEC_OID_SHA256;
- break;
- case SEC_OID_ANSIX962_ECDSA_SHA384_SIGNATURE:
- case SEC_OID_PKCS1_SHA384_WITH_RSA_ENCRYPTION:
- *hashalg = SEC_OID_SHA384;
- break;
- case SEC_OID_ANSIX962_ECDSA_SHA512_SIGNATURE:
- case SEC_OID_PKCS1_SHA512_WITH_RSA_ENCRYPTION:
- *hashalg = SEC_OID_SHA512;
- break;
- case SEC_OID_ANSIX962_ECDSA_SIGNATURE_RECOMMENDED_DIGEST:
- /* This is an EC algorithm. Recommended means the largest
- * hash algorithm that is not truncated by the keysize of
- * the EC algorithm. Note that key strength is in bytes and
- * algorithms are specified in bits. Never use an algorithm
- * weaker than sha1. */
- len = SECKEY_PublicKeyStrength((SECKEYPublicKey *)key);
- if (len < 28) { /* 28 bytes == 244 bits */
- *hashalg = SEC_OID_SHA1;
- } else if (len < 32) { /* 32 bytes == 256 bits */
- /* we don't support 244 bit hash algorithms */
- PORT_SetError(SEC_ERROR_INVALID_ALGORITHM);
- return SECFailure;
- } else if (len < 48) { /* 48 bytes == 384 bits */
- *hashalg = SEC_OID_SHA256;
- } else if (len < 64) { /* 48 bytes == 512 bits */
- *hashalg = SEC_OID_SHA384;
- } else {
- /* use the largest in this case */
- *hashalg = SEC_OID_SHA512;
- }
- break;
- case SEC_OID_ANSIX962_ECDSA_SIGNATURE_SPECIFIED_DIGEST:
- if (params == NULL) {
- PORT_SetError(SEC_ERROR_INVALID_ALGORITHM);
- return SECFailure;
- }
- arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
- if (arena == NULL) {
- return SECFailure;
- }
- rv = SEC_QuickDERDecodeItem(arena, &oid, hashParameterTemplate, params);
- if (rv != SECSuccess) {
- PORT_FreeArena(arena, PR_FALSE);
- return rv;
- }
-
- *hashalg = SECOID_FindOIDTag(&oid);
- PORT_FreeArena(arena, PR_FALSE);
- if (*hashalg == SEC_OID_UNKNOWN) {
- PORT_SetError(SEC_ERROR_INVALID_ALGORITHM);
- return SECFailure;
- }
- break;
-
- /* what about normal DSA? */
- case SEC_OID_ANSIX9_DSA_SIGNATURE_WITH_SHA1_DIGEST:
- case SEC_OID_BOGUS_DSA_SIGNATURE_WITH_SHA1_DIGEST:
- case SEC_OID_ANSIX962_ECDSA_SHA1_SIGNATURE:
- *hashalg = SEC_OID_SHA1;
- break;
- case SEC_OID_MISSI_DSS:
- case SEC_OID_MISSI_KEA_DSS:
- case SEC_OID_MISSI_KEA_DSS_OLD:
- case SEC_OID_MISSI_DSS_OLD:
- *hashalg = SEC_OID_SHA1;
- break;
- /* we don't implement MD4 hashes */
- case SEC_OID_PKCS1_MD4_WITH_RSA_ENCRYPTION:
- default:
- return SECFailure;
- }
- return SECSuccess;
-}
-
-static VFYContext *
-vfy_CreateContextPrivate(const SECKEYPublicKey *key, const SECItem *sig,
- SECOidTag algid, const SECItem *params, void *wincx)
-{
- VFYContext *cx;
- SECStatus rv;
- unsigned int sigLen;
-
- cx = (VFYContext*) PORT_ZAlloc(sizeof(VFYContext));
- if (cx) {
- cx->wincx = wincx;
- cx->hasSignature = (sig != NULL);
- cx->sigAlg = algid;
- rv = SECSuccess;
- switch (key->keyType) {
- case rsaKey:
- cx->type = VFY_RSA;
- /* keep our own copy */
- cx->key = SECKEY_CopyPublicKey((SECKEYPublicKey *)key);
- if (sig) {
- SECOidTag hashid = SEC_OID_UNKNOWN;
- unsigned int digestlen = 0;
- rv = DecryptSigBlock(&hashid, cx->u.buffer, &digestlen,
- HASH_LENGTH_MAX, cx->key, sig, (char*)wincx);
- cx->alg = hashid;
- cx->rsadigestlen = digestlen;
- } else {
- rv = decodeSigAlg(algid, params, key, &cx->alg);
- }
- break;
- case fortezzaKey:
- case dsaKey:
- case ecKey:
- if (key->keyType == ecKey) {
- cx->type = VFY_ECDSA;
- /* Unlike DSA, ECDSA does not have a fixed signature length
- * (it depends on the key size)
- */
- sigLen = SECKEY_SignatureLen(key);
- } else {
- cx->type = VFY_DSA;
- sigLen = DSA_SIGNATURE_LEN;
- }
- if (sigLen == 0) {
- rv = SECFailure;
- break;
- }
- rv = decodeSigAlg(algid, params, key, &cx->alg);
- if (rv != SECSuccess) {
- break;
- }
- cx->key = SECKEY_CopyPublicKey((SECKEYPublicKey *)key);
- if (sig) {
- rv = decodeECorDSASignature(algid,sig,cx->u.buffer,sigLen);
- }
- break;
- default:
- rv = SECFailure;
- break;
- }
- if (rv) goto loser;
- switch (cx->alg) {
- case SEC_OID_MD2:
- case SEC_OID_MD5:
- case SEC_OID_SHA1:
- case SEC_OID_SHA256:
- case SEC_OID_SHA384:
- case SEC_OID_SHA512:
- break;
- default:
- PORT_SetError(SEC_ERROR_INVALID_ALGORITHM);
- goto loser;
- }
- }
- return cx;
-
- loser:
- VFY_DestroyContext(cx, PR_TRUE);
- return 0;
-}
-
-VFYContext *
-VFY_CreateContext(SECKEYPublicKey *key, SECItem *sig, SECOidTag algid,
- void *wincx)
-{
- return vfy_CreateContextPrivate(key, sig, algid, NULL, wincx);
-}
-
-void
-VFY_DestroyContext(VFYContext *cx, PRBool freeit)
-{
- if (cx) {
- if (cx->hashcx != NULL) {
- (*cx->hashobj->destroy)(cx->hashcx, PR_TRUE);
- cx->hashcx = NULL;
- }
- if (cx->key) {
- SECKEY_DestroyPublicKey(cx->key);
- }
- if (freeit) {
- PORT_ZFree(cx, sizeof(VFYContext));
- }
- }
-}
-
-SECStatus
-VFY_Begin(VFYContext *cx)
-{
- if (cx->hashcx != NULL) {
- (*cx->hashobj->destroy)(cx->hashcx, PR_TRUE);
- cx->hashcx = NULL;
- }
-
- cx->hashobj = HASH_GetHashObjectByOidTag(cx->alg);
- if (!cx->hashobj)
- return SECFailure; /* error code is set */
-
- cx->hashcx = (*cx->hashobj->create)();
- if (cx->hashcx == NULL)
- return SECFailure;
-
- (*cx->hashobj->begin)(cx->hashcx);
- return SECSuccess;
-}
-
-SECStatus
-VFY_Update(VFYContext *cx, unsigned char *input, unsigned inputLen)
-{
- if (cx->hashcx == NULL) {
- PORT_SetError(SEC_ERROR_INVALID_ARGS);
- return SECFailure;
- }
- (*cx->hashobj->update)(cx->hashcx, input, inputLen);
- return SECSuccess;
-}
-
-SECStatus
-VFY_EndWithSignature(VFYContext *cx, SECItem *sig)
-{
- unsigned char final[HASH_LENGTH_MAX];
- unsigned part;
- SECItem hash,dsasig; /* dsasig is also used for ECDSA */
- SECStatus rv;
-
- if ((cx->hasSignature == PR_FALSE) && (sig == NULL)) {
- PORT_SetError(SEC_ERROR_INVALID_ARGS);
- return SECFailure;
- }
-
- if (cx->hashcx == NULL) {
- PORT_SetError(SEC_ERROR_INVALID_ARGS);
- return SECFailure;
- }
- (*cx->hashobj->end)(cx->hashcx, final, &part, sizeof(final));
- switch (cx->type) {
- case VFY_DSA:
- case VFY_ECDSA:
- dsasig.data = cx->u.buffer;
- if (cx->type == VFY_DSA) {
- dsasig.len = DSA_SIGNATURE_LEN;
- } else {
- dsasig.len = SECKEY_SignatureLen(cx->key);
- }
- if (dsasig.len == 0) {
- return SECFailure;
- }
- if (sig) {
- rv = decodeECorDSASignature(cx->sigAlg,sig,dsasig.data,
- dsasig.len);
- if (rv != SECSuccess) {
- PORT_SetError(SEC_ERROR_BAD_SIGNATURE);
- return SECFailure;
- }
- }
- hash.data = final;
- hash.len = part;
- if (PK11_Verify(cx->key,&dsasig,&hash,cx->wincx) != SECSuccess) {
- PORT_SetError(SEC_ERROR_BAD_SIGNATURE);
- return SECFailure;
- }
- break;
- case VFY_RSA:
- if (sig) {
- SECOidTag hashid = SEC_OID_UNKNOWN;
- rv = DecryptSigBlock(&hashid, cx->u.buffer, &cx->rsadigestlen,
- HASH_LENGTH_MAX, cx->key, sig, (char*)cx->wincx);
- if ((rv != SECSuccess) || (hashid != cx->alg)) {
- PORT_SetError(SEC_ERROR_BAD_SIGNATURE);
- return SECFailure;
- }
- }
- if ((part != cx->rsadigestlen) ||
- PORT_Memcmp(final, cx->u.buffer, part)) {
- PORT_SetError(SEC_ERROR_BAD_SIGNATURE);
- return SECFailure;
- }
- break;
- default:
- PORT_SetError(SEC_ERROR_BAD_SIGNATURE);
- return SECFailure; /* shouldn't happen */
- }
- return SECSuccess;
-}
-
-SECStatus
-VFY_End(VFYContext *cx)
-{
- return VFY_EndWithSignature(cx,NULL);
-}
-
-/************************************************************************/
-/*
- * Verify that a previously-computed digest matches a signature.
- * XXX This should take a parameter that specifies the digest algorithm,
- * and we should compare that the algorithm found in the DigestInfo
- * matches it!
- */
-SECStatus
-VFY_VerifyDigest(SECItem *digest, SECKEYPublicKey *key, SECItem *sig,
- SECOidTag algid, void *wincx)
-{
- SECStatus rv;
- VFYContext *cx;
- SECItem dsasig; /* also used for ECDSA */
-
- rv = SECFailure;
-
- cx = VFY_CreateContext(key, sig, algid, wincx);
- if (cx != NULL) {
- switch (key->keyType) {
- case rsaKey:
- if ((digest->len != cx->rsadigestlen) ||
- PORT_Memcmp(digest->data, cx->u.buffer, digest->len)) {
- PORT_SetError(SEC_ERROR_BAD_SIGNATURE);
- } else {
- rv = SECSuccess;
- }
- break;
- case fortezzaKey:
- case dsaKey:
- case ecKey:
- dsasig.data = cx->u.buffer;
- if (key->keyType == ecKey) {
- dsasig.len = SECKEY_SignatureLen(cx->key);
- } else {
- /* magic size of dsa signature */
- dsasig.len = DSA_SIGNATURE_LEN;
- }
- if (dsasig.len == 0) {
- break;
- }
- if (PK11_Verify(cx->key, &dsasig, digest, cx->wincx)
- != SECSuccess) {
- PORT_SetError(SEC_ERROR_BAD_SIGNATURE);
- } else {
- rv = SECSuccess;
- }
- break;
- default:
- break;
- }
- VFY_DestroyContext(cx, PR_TRUE);
- }
- return rv;
-}
-
-static SECStatus
-vfy_VerifyDataPrivate(const unsigned char *buf, int len,
- const SECKEYPublicKey *key, const SECItem *sig,
- SECOidTag algid, const SECItem *params, void *wincx)
-{
- SECStatus rv;
- VFYContext *cx;
-
- cx = vfy_CreateContextPrivate(key, sig, algid, params, wincx);
- if (cx == NULL)
- return SECFailure;
-
- rv = VFY_Begin(cx);
- if (rv == SECSuccess) {
- rv = VFY_Update(cx, (unsigned char *)buf, len);
- if (rv == SECSuccess)
- rv = VFY_End(cx);
- }
-
- VFY_DestroyContext(cx, PR_TRUE);
- return rv;
-}
-
-SECStatus
-VFY_VerifyData(unsigned char *buf, int len, SECKEYPublicKey *key,
- SECItem *sig, SECOidTag algid, void *wincx)
-{
- return vfy_VerifyDataPrivate(buf, len, key, sig, algid, NULL, wincx);
-}
-
-/*
- * this function is private to nss3.dll in NSS 3.11
- */
-SECStatus
-VFY_VerifyDataWithAlgorithmID(const unsigned char *buf, int len,
- const SECKEYPublicKey *key,
- const SECItem *sig,
- const SECAlgorithmID *sigAlgorithm,
- SECOidTag *reserved, void *wincx)
-{
- /* the hash parameter is only provided to match the NSS 3.12 signature */
- PORT_Assert(reserved == NULL);
- if (reserved) {
- /* shouldn't happen, This function is not exported, and the only
- * NSS callers pass 'NULL' */
- PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
- return SECFailure;
- }
- return vfy_VerifyDataPrivate(buf, len, key, sig,
- SECOID_GetAlgorithmTag((SECAlgorithmID *)sigAlgorithm),
- &sigAlgorithm->parameters, wincx);
-}
-