diff options
Diffstat (limited to 'security/nss/lib/cryptohi/secsign.c')
| -rw-r--r-- | security/nss/lib/cryptohi/secsign.c | 510 |
1 files changed, 510 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..1bbdd5384 --- /dev/null +++ b/security/nss/lib/cryptohi/secsign.c @@ -0,0 +1,510 @@ +/* + * Signature stuff. + * + * 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 <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" +#include "keyi.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; + SECStatus rv; + + /* 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_SHA1_RSA_PKCS and/or CKM_MD5_RSA_PKCS. + */ + /* we have a private key, not a public key, so don't pass it in */ + rv = sec_DecodeSigAlg(NULL, alg, NULL, &signalg, &hashalg); + if (rv != SECSuccess) { + PORT_SetError(SEC_ERROR_INVALID_ALGORITHM); + return 0; + } + keyType = seckey_GetKeyType(signalg); + + /* verify our key type */ + if (key->keyType != keyType && + !((key->keyType == dsaKey) && (keyType == fortezzaKey))) { + 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; + } + + cx->hashobj = HASH_GetHashObjectByOidTag(cx->hashalg); + if (!cx->hashobj) + return SECFailure; /* error code is already set */ + + cx->hashcx = (*cx->hashobj->create)(); + if (cx->hashcx == NULL) + return SECFailure; + + (*cx->hashobj->begin)(cx->hashcx); + return SECSuccess; +} + +SECStatus +SGN_Update(SGNContext *cx, const unsigned char *input, unsigned int inputLen) +{ + if (cx->hashcx == NULL) { + PORT_SetError(SEC_ERROR_INVALID_ARGS); + return SECFailure; + } + (*cx->hashobj->update)(cx->hashcx, input, inputLen); + return SECSuccess; +} + +/* XXX Old template; want to expunge it eventually. */ +static DERTemplate SECAlgorithmIDTemplate[] = { + { DER_SEQUENCE, + 0, NULL, sizeof(SECAlgorithmID) }, + { DER_OBJECT_ID, + offsetof(SECAlgorithmID, algorithm) }, + { DER_OPTIONAL | DER_ANY, + offsetof(SECAlgorithmID, parameters) }, + { 0 } +}; + +/* + * XXX OLD Template. Once all uses have been switched over to new one, + * remove this. + */ +static DERTemplate SGNDigestInfoTemplate[] = { + { DER_SEQUENCE, + 0, NULL, sizeof(SGNDigestInfo) }, + { DER_INLINE, + offsetof(SGNDigestInfo, digestAlgorithm), + SECAlgorithmIDTemplate }, + { DER_OCTET_STRING, + offsetof(SGNDigestInfo, digest) }, + { 0 } +}; + +SECStatus +SGN_End(SGNContext *cx, SECItem *result) +{ + unsigned char digest[HASH_LENGTH_MAX]; + unsigned part1; + int signatureLen; + SECStatus rv; + SECItem digder, sigitem; + PLArenaPool *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); + if (signatureLen <= 0) { + PORT_SetError(SEC_ERROR_INVALID_KEY); + rv = SECFailure; + goto loser; + } + 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; + goto loser; + } + + if ((cx->signalg == SEC_OID_ANSIX9_DSA_SIGNATURE) || + (cx->signalg == SEC_OID_ANSIX962_EC_PUBLIC_KEY)) { + /* DSAU_EncodeDerSigWithLen works for DSA and ECDSA */ + rv = DSAU_EncodeDerSigWithLen(result, &sigitem, sigitem.len); + 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, const 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; +} + +/************************************************************************/ + +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 } + }; + +SEC_ASN1_MKSUB(SECOID_AlgorithmIDTemplate) + +const SEC_ASN1Template CERT_SignedDataTemplate[] = + { + { SEC_ASN1_SEQUENCE, + 0, NULL, sizeof(CERTSignedData) }, + { SEC_ASN1_ANY, + offsetof(CERTSignedData, data) }, + { SEC_ASN1_INLINE | SEC_ASN1_XTRN, + offsetof(CERTSignedData, signatureAlgorithm), + SEC_ASN1_SUB(SECOID_AlgorithmIDTemplate) }, + { SEC_ASN1_BIT_STRING, + offsetof(CERTSignedData, signature) }, + { 0 } + }; + +SEC_ASN1_CHOOSER_IMPLEMENT(CERT_SignedDataTemplate) + +SECStatus +SEC_DerSignData(PLArenaPool *arena, SECItem *result, + const 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: + /* get Signature length (= q_len*2) and work from there */ + switch (PK11_SignatureLen(pk)) { + case 448: + algID = SEC_OID_NIST_DSA_SIGNATURE_WITH_SHA224_DIGEST; + break; + case 512: + algID = SEC_OID_NIST_DSA_SIGNATURE_WITH_SHA256_DIGEST; + break; + default: + algID = SEC_OID_ANSIX9_DSA_SIGNATURE_WITH_SHA1_DIGEST; + break; + } + break; + case ecKey: + algID = SEC_OID_ANSIX962_ECDSA_SIGNATURE_WITH_SHA1_DIGEST; + break; + default: + PORT_SetError(SEC_ERROR_INVALID_KEY); + return SECFailure; + } + } + + /* 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 = (unsigned char *)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) +{ + int modulusLen; + SECStatus rv; + SECItem digder; + PLArenaPool *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); + if (modulusLen <= 0) { + PORT_SetError(SEC_ERROR_INVALID_KEY); + rv = SECFailure; + goto loser; + } + result->len = modulusLen; + result->data = (unsigned char *)PORT_Alloc(modulusLen); + result->type = siBuffer; + + 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; +} + +SECOidTag +SEC_GetSignatureAlgorithmOidTag(KeyType keyType, SECOidTag hashAlgTag) +{ + SECOidTag sigTag = SEC_OID_UNKNOWN; + + switch (keyType) { + case rsaKey: + switch (hashAlgTag) { + case SEC_OID_MD2: + sigTag = SEC_OID_PKCS1_MD2_WITH_RSA_ENCRYPTION; + break; + case SEC_OID_MD5: + sigTag = SEC_OID_PKCS1_MD5_WITH_RSA_ENCRYPTION; + break; + case SEC_OID_SHA1: + sigTag = SEC_OID_PKCS1_SHA1_WITH_RSA_ENCRYPTION; + break; + case SEC_OID_SHA224: + sigTag = SEC_OID_PKCS1_SHA224_WITH_RSA_ENCRYPTION; + break; + case SEC_OID_UNKNOWN: /* default for RSA if not specified */ + case SEC_OID_SHA256: + sigTag = SEC_OID_PKCS1_SHA256_WITH_RSA_ENCRYPTION; + break; + case SEC_OID_SHA384: + sigTag = SEC_OID_PKCS1_SHA384_WITH_RSA_ENCRYPTION; + break; + case SEC_OID_SHA512: + sigTag = SEC_OID_PKCS1_SHA512_WITH_RSA_ENCRYPTION; + break; + default: + break; + } + break; + case dsaKey: + switch (hashAlgTag) { + case SEC_OID_UNKNOWN: /* default for DSA if not specified */ + case SEC_OID_SHA1: + sigTag = SEC_OID_ANSIX9_DSA_SIGNATURE_WITH_SHA1_DIGEST; + break; + case SEC_OID_SHA224: + sigTag = SEC_OID_NIST_DSA_SIGNATURE_WITH_SHA224_DIGEST; + break; + case SEC_OID_SHA256: + sigTag = SEC_OID_NIST_DSA_SIGNATURE_WITH_SHA256_DIGEST; + break; + default: + break; + } + break; + case ecKey: + switch (hashAlgTag) { + case SEC_OID_UNKNOWN: /* default for ECDSA if not specified */ + case SEC_OID_SHA1: + sigTag = SEC_OID_ANSIX962_ECDSA_SHA1_SIGNATURE; + break; + case SEC_OID_SHA224: + sigTag = SEC_OID_ANSIX962_ECDSA_SHA224_SIGNATURE; + break; + case SEC_OID_SHA256: + sigTag = SEC_OID_ANSIX962_ECDSA_SHA256_SIGNATURE; + break; + case SEC_OID_SHA384: + sigTag = SEC_OID_ANSIX962_ECDSA_SHA384_SIGNATURE; + break; + case SEC_OID_SHA512: + sigTag = SEC_OID_ANSIX962_ECDSA_SHA512_SIGNATURE; + break; + default: + break; + } + default: + break; + } + return sigTag; +} |