diff options
Diffstat (limited to 'security/nss/lib/cryptohi/secsign.c')
| -rw-r--r-- | security/nss/lib/cryptohi/secsign.c | 500 |
1 files changed, 500 insertions, 0 deletions
diff --git a/security/nss/lib/cryptohi/secsign.c b/security/nss/lib/cryptohi/secsign.c new file mode 100644 index 000000000..98131c6eb --- /dev/null +++ b/security/nss/lib/cryptohi/secsign.c @@ -0,0 +1,500 @@ +/* + * Signature stuff. + * + * 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. + * + * $Id$ + */ + +#include <stdio.h> +#include "cryptohi.h" +#include "sechash.h" +#include "secder.h" +#include "keyhi.h" +#include "secoid.h" +#include "secdig.h" +#include "pk11func.h" +#include "secerr.h" + +struct SGNContextStr { + SECOidTag signalg; + SECOidTag hashalg; + void *hashcx; + const SECHashObject *hashobj; + SECKEYPrivateKey *key; +}; + +SGNContext * +SGN_NewContext(SECOidTag alg, SECKEYPrivateKey *key) +{ + SGNContext *cx; + SECOidTag hashalg, signalg; + KeyType keyType; + + /* OK, map a PKCS #7 hash and encrypt algorithm into + * a standard hashing algorithm. Why did we pass in the whole + * PKCS #7 algTag if we were just going to change here you might + * ask. Well the answer is for some cards we may have to do the + * hashing on card. It may not support CKM_RSA_PKCS sign algorithm, + * it may just support CKM_RSA_PKCS_WITH_SHA1 and/or CKM_RSA_PKCS_WITH_MD5. + */ + switch (alg) { + /* We probably shouldn't be generating MD2 signatures either */ + case SEC_OID_PKCS1_MD2_WITH_RSA_ENCRYPTION: + hashalg = SEC_OID_MD2; + signalg = SEC_OID_PKCS1_RSA_ENCRYPTION; + keyType = rsaKey; + break; + case SEC_OID_PKCS1_MD5_WITH_RSA_ENCRYPTION: + hashalg = SEC_OID_MD5; + signalg = SEC_OID_PKCS1_RSA_ENCRYPTION; + keyType = rsaKey; + break; + case SEC_OID_PKCS1_SHA1_WITH_RSA_ENCRYPTION: + case SEC_OID_ISO_SHA_WITH_RSA_SIGNATURE: + hashalg = SEC_OID_SHA1; + signalg = SEC_OID_PKCS1_RSA_ENCRYPTION; + keyType = rsaKey; + break; + /* what about normal DSA? */ + case SEC_OID_ANSIX9_DSA_SIGNATURE_WITH_SHA1_DIGEST: + case SEC_OID_BOGUS_DSA_SIGNATURE_WITH_SHA1_DIGEST: + hashalg = SEC_OID_SHA1; + signalg = SEC_OID_ANSIX9_DSA_SIGNATURE; + keyType = dsaKey; + 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; + signalg = SEC_OID_MISSI_DSS; /* XXX Is there a better algid? */ + keyType = fortezzaKey; + break; + /* we don't implement MD4 hashes. + * we *CERTAINLY* don't want to sign one! */ + case SEC_OID_PKCS1_MD4_WITH_RSA_ENCRYPTION: + default: + PORT_SetError(SEC_ERROR_INVALID_ARGS); + return 0; + } + + /* verify our key type */ + if (key->keyType != keyType && + !((key->keyType == dsaKey) && (keyType == fortezzaKey)) && + !((key->keyType == fortezzaKey) && (keyType == dsaKey)) ) { + PORT_SetError(SEC_ERROR_INVALID_ALGORITHM); + return 0; + } + + cx = (SGNContext*) PORT_ZAlloc(sizeof(SGNContext)); + if (cx) { + cx->hashalg = hashalg; + cx->signalg = signalg; + cx->key = key; + } + return cx; +} + +void +SGN_DestroyContext(SGNContext *cx, PRBool freeit) +{ + if (cx) { + if (cx->hashcx != NULL) { + (*cx->hashobj->destroy)(cx->hashcx, PR_TRUE); + cx->hashcx = NULL; + } + if (freeit) { + PORT_ZFree(cx, sizeof(SGNContext)); + } + } +} + +SECStatus +SGN_Begin(SGNContext *cx) +{ + if (cx->hashcx != NULL) { + (*cx->hashobj->destroy)(cx->hashcx, PR_TRUE); + cx->hashcx = NULL; + } + + switch (cx->hashalg) { + case SEC_OID_MD2: + cx->hashobj = &SECHashObjects[HASH_AlgMD2]; + break; + case SEC_OID_MD5: + cx->hashobj = &SECHashObjects[HASH_AlgMD5]; + break; + case SEC_OID_SHA1: + cx->hashobj = &SECHashObjects[HASH_AlgSHA1]; + break; + default: + PORT_SetError(SEC_ERROR_INVALID_ALGORITHM); + return SECFailure; + } + + cx->hashcx = (*cx->hashobj->create)(); + if (cx->hashcx == NULL) + return SECFailure; + + (*cx->hashobj->begin)(cx->hashcx); + return SECSuccess; +} + +SECStatus +SGN_Update(SGNContext *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 +SGN_End(SGNContext *cx, SECItem *result) +{ + unsigned char digest[32]; + unsigned part1, signatureLen; + SECStatus rv; + SECItem digder, sigitem; + PRArenaPool *arena = 0; + SECKEYPrivateKey *privKey = cx->key; + SGNDigestInfo *di = 0; + + + result->data = 0; + digder.data = 0; + + /* Finish up digest function */ + if (cx->hashcx == NULL) { + PORT_SetError(SEC_ERROR_INVALID_ARGS); + return SECFailure; + } + (*cx->hashobj->end)(cx->hashcx, digest, &part1, sizeof(digest)); + + + if (privKey->keyType == rsaKey) { + + arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE); + if ( !arena ) { + rv = SECFailure; + goto loser; + } + + /* Construct digest info */ + di = SGN_CreateDigestInfo(cx->hashalg, digest, part1); + if (!di) { + rv = SECFailure; + goto loser; + } + + /* Der encode the digest as a DigestInfo */ + rv = DER_Encode(arena, &digder, SGNDigestInfoTemplate, di); + if (rv != SECSuccess) { + goto loser; + } + } else { + digder.data = digest; + digder.len = part1; + } + + /* + ** Encrypt signature after constructing appropriate PKCS#1 signature + ** block + */ + signatureLen = PK11_SignatureLen(privKey); + sigitem.len = signatureLen; + sigitem.data = (unsigned char*) PORT_Alloc(signatureLen); + + if (sigitem.data == NULL) { + rv = SECFailure; + goto loser; + } + + rv = PK11_Sign(privKey, &sigitem, &digder); + if (rv != SECSuccess) { + PORT_Free(sigitem.data); + sigitem.data = NULL; + } + + if (cx->signalg == SEC_OID_ANSIX9_DSA_SIGNATURE) { + rv = DSAU_EncodeDerSig(result, &sigitem); + PORT_Free(sigitem.data); + if (rv != SECSuccess) + goto loser; + } else { + result->len = sigitem.len; + result->data = sigitem.data; + } + + loser: + SGN_DestroyDigestInfo(di); + if (arena != NULL) { + PORT_FreeArena(arena, PR_FALSE); + } + return rv; +} + +/************************************************************************/ + +/* +** Sign a block of data returning in result a bunch of bytes that are the +** signature. Returns zero on success, an error code on failure. +*/ +SECStatus +SEC_SignData(SECItem *res, unsigned char *buf, int len, + SECKEYPrivateKey *pk, SECOidTag algid) +{ + SECStatus rv; + SGNContext *sgn; + + + sgn = SGN_NewContext(algid, pk); + + if (sgn == NULL) + return SECFailure; + + rv = SGN_Begin(sgn); + if (rv != SECSuccess) + goto loser; + + rv = SGN_Update(sgn, buf, len); + if (rv != SECSuccess) + goto loser; + + rv = SGN_End(sgn, res); + + loser: + SGN_DestroyContext(sgn, PR_TRUE); + return rv; +} + +/* +** Sign the input file's contents returning in result a bunch of bytes +** that are the signature. Returns zero on success, an error code on +** failure. +*/ +SECStatus +SEC_SignFile(SECItem *result, FILE *input, + SECKEYPrivateKey *pk, SECOidTag algid) +{ + unsigned char buf[1024]; + SECStatus rv; + int nb; + SGNContext *sgn; + + sgn = SGN_NewContext(algid, pk); + if (sgn == NULL) + return SECFailure; + rv = SGN_Begin(sgn); + if (rv != SECSuccess) + goto loser; + + /* + ** Now feed the contents of the input file into the digest + ** algorithm, one chunk at a time, until we have exhausted the + ** input + */ + for (;;) { + if (feof(input)) break; + nb = fread(buf, 1, sizeof(buf), input); + if (nb == 0) { + if (ferror(input)) { + PORT_SetError(SEC_ERROR_IO); + rv = SECFailure; + goto loser; + } + break; + } + rv = SGN_Update(sgn, buf, nb); + if (rv != SECSuccess) + goto loser; + } + + /* Sign the digest */ + rv = SGN_End(sgn, result); + /* FALL THROUGH */ + + loser: + SGN_DestroyContext(sgn, PR_TRUE); + return rv; +} + +/************************************************************************/ + +DERTemplate CERTSignedDataTemplate[] = +{ + { DER_SEQUENCE, + 0, NULL, sizeof(CERTSignedData) }, + { DER_ANY, + offsetof(CERTSignedData,data), }, + { DER_INLINE, + offsetof(CERTSignedData,signatureAlgorithm), + SECAlgorithmIDTemplate, }, + { DER_BIT_STRING, + offsetof(CERTSignedData,signature), }, + { 0, } +}; + +const SEC_ASN1Template CERT_SignedDataTemplate[] = +{ + { SEC_ASN1_SEQUENCE, + 0, NULL, sizeof(CERTSignedData) }, + { SEC_ASN1_ANY, + offsetof(CERTSignedData,data), }, + { SEC_ASN1_INLINE, + offsetof(CERTSignedData,signatureAlgorithm), + SECOID_AlgorithmIDTemplate, }, + { SEC_ASN1_BIT_STRING, + offsetof(CERTSignedData,signature), }, + { 0, } +}; + +SEC_ASN1_CHOOSER_IMPLEMENT(CERT_SignedDataTemplate) + + +SECStatus +SEC_DerSignData(PRArenaPool *arena, SECItem *result, + unsigned char *buf, int len, SECKEYPrivateKey *pk, SECOidTag algID) +{ + SECItem it; + CERTSignedData sd; + SECStatus rv; + + it.data = 0; + + /* XXX We should probably have some asserts here to make sure the key type + * and algID match + */ + + if (algID == SEC_OID_UNKNOWN) { + switch(pk->keyType) { + case rsaKey: + algID = SEC_OID_PKCS1_SHA1_WITH_RSA_ENCRYPTION; + break; + case dsaKey: + algID = SEC_OID_ANSIX9_DSA_SIGNATURE_WITH_SHA1_DIGEST; + break; + default: + return SECFailure; + break; + } + } + + /* Sign input buffer */ + rv = SEC_SignData(&it, buf, len, pk, algID); + if (rv) goto loser; + + /* Fill out SignedData object */ + PORT_Memset(&sd, 0, sizeof(sd)); + sd.data.data = buf; + sd.data.len = len; + sd.signature.data = it.data; + sd.signature.len = it.len << 3; /* convert to bit string */ + rv = SECOID_SetAlgorithmID(arena, &sd.signatureAlgorithm, algID, 0); + if (rv) goto loser; + + /* DER encode the signed data object */ + rv = DER_Encode(arena, result, CERTSignedDataTemplate, &sd); + /* FALL THROUGH */ + + loser: + PORT_Free(it.data); + return rv; +} + +SECStatus +SGN_Digest(SECKEYPrivateKey *privKey, + SECOidTag algtag, SECItem *result, SECItem *digest) +{ + unsigned modulusLen; + SECStatus rv; + SECItem digder; + PRArenaPool *arena = 0; + SGNDigestInfo *di = 0; + + + result->data = 0; + + if (privKey->keyType == rsaKey) { + + arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE); + if ( !arena ) { + rv = SECFailure; + goto loser; + } + + /* Construct digest info */ + di = SGN_CreateDigestInfo(algtag, digest->data, digest->len); + if (!di) { + rv = SECFailure; + goto loser; + } + + /* Der encode the digest as a DigestInfo */ + rv = DER_Encode(arena, &digder, SGNDigestInfoTemplate, di); + if (rv != SECSuccess) { + goto loser; + } + } else { + digder.data = digest->data; + digder.len = digest->len; + } + + /* + ** Encrypt signature after constructing appropriate PKCS#1 signature + ** block + */ + modulusLen = PK11_SignatureLen(privKey); + result->len = modulusLen; + result->data = (unsigned char*) PORT_Alloc(modulusLen); + + if (result->data == NULL) { + rv = SECFailure; + goto loser; + } + + rv = PK11_Sign(privKey, result, &digder); + if (rv != SECSuccess) { + PORT_Free(result->data); + result->data = NULL; + } + + loser: + SGN_DestroyDigestInfo(di); + if (arena != NULL) { + PORT_FreeArena(arena, PR_FALSE); + } + return rv; +} |