diff options
Diffstat (limited to 'security/nss/lib/cryptohi/secsign.c')
| -rw-r--r-- | security/nss/lib/cryptohi/secsign.c | 378 |
1 files changed, 354 insertions, 24 deletions
diff --git a/security/nss/lib/cryptohi/secsign.c b/security/nss/lib/cryptohi/secsign.c index d06cb2e85..dc10f2fa6 100644 --- a/security/nss/lib/cryptohi/secsign.c +++ b/security/nss/lib/cryptohi/secsign.c @@ -22,10 +22,11 @@ struct SGNContextStr { void *hashcx; const SECHashObject *hashobj; SECKEYPrivateKey *key; + SECItem *params; }; -SGNContext * -SGN_NewContext(SECOidTag alg, SECKEYPrivateKey *key) +static SGNContext * +sgn_NewContext(SECOidTag alg, SECItem *params, SECKEYPrivateKey *key) { SGNContext *cx; SECOidTag hashalg, signalg; @@ -40,7 +41,7 @@ SGN_NewContext(SECOidTag alg, SECKEYPrivateKey *key) * 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); + rv = sec_DecodeSigAlg(NULL, alg, params, &signalg, &hashalg); if (rv != SECSuccess) { PORT_SetError(SEC_ERROR_INVALID_ALGORITHM); return 0; @@ -49,7 +50,8 @@ SGN_NewContext(SECOidTag alg, SECKEYPrivateKey *key) /* verify our key type */ if (key->keyType != keyType && - !((key->keyType == dsaKey) && (keyType == fortezzaKey))) { + !((key->keyType == dsaKey) && (keyType == fortezzaKey)) && + !((key->keyType == rsaKey) && (keyType == rsaPssKey))) { PORT_SetError(SEC_ERROR_INVALID_ALGORITHM); return 0; } @@ -59,10 +61,24 @@ SGN_NewContext(SECOidTag alg, SECKEYPrivateKey *key) cx->hashalg = hashalg; cx->signalg = signalg; cx->key = key; + cx->params = params; } return cx; } +SGNContext * +SGN_NewContext(SECOidTag alg, SECKEYPrivateKey *key) +{ + return sgn_NewContext(alg, NULL, key); +} + +SGNContext * +SGN_NewContextWithAlgorithmID(SECAlgorithmID *alg, SECKEYPrivateKey *key) +{ + SECOidTag tag = SECOID_GetAlgorithmTag(alg); + return sgn_NewContext(tag, &alg->parameters, key); +} + void SGN_DestroyContext(SGNContext *cx, PRBool freeit) { @@ -148,6 +164,7 @@ SGN_End(SGNContext *cx, SECItem *result) result->data = 0; digder.data = 0; + sigitem.data = 0; /* Finish up digest function */ if (cx->hashcx == NULL) { @@ -156,7 +173,8 @@ SGN_End(SGNContext *cx, SECItem *result) } (*cx->hashobj->end)(cx->hashcx, digest, &part1, sizeof(digest)); - if (privKey->keyType == rsaKey) { + if (privKey->keyType == rsaKey && + cx->signalg != SEC_OID_PKCS1_RSA_PSS_SIGNATURE) { arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE); if (!arena) { @@ -200,26 +218,65 @@ SGN_End(SGNContext *cx, SECItem *result) 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_PKCS1_RSA_PSS_SIGNATURE) { + CK_RSA_PKCS_PSS_PARAMS mech; + SECItem mechItem = { siBuffer, (unsigned char *)&mech, sizeof(mech) }; + + PORT_Memset(&mech, 0, sizeof(mech)); + + if (cx->params && cx->params->data) { + SECKEYRSAPSSParams params; + + arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE); + if (!arena) { + rv = SECFailure; + goto loser; + } + + PORT_Memset(¶ms, 0, sizeof(params)); + rv = SEC_QuickDERDecodeItem(arena, ¶ms, + SECKEY_RSAPSSParamsTemplate, + cx->params); + if (rv != SECSuccess) { + goto loser; + } + rv = sec_RSAPSSParamsToMechanism(&mech, ¶ms); + if (rv != SECSuccess) { + goto loser; + } + } else { + mech.hashAlg = CKM_SHA_1; + mech.mgf = CKG_MGF1_SHA1; + mech.sLen = digder.len; + } + rv = PK11_SignWithMechanism(privKey, CKM_RSA_PKCS_PSS, &mechItem, + &sigitem, &digder); + if (rv != SECSuccess) { + goto loser; + } + } else { + rv = PK11_Sign(privKey, &sigitem, &digder); + if (rv != SECSuccess) { + 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; + SECITEM_FreeItem(&sigitem, PR_FALSE); } else { result->len = sigitem.len; result->data = sigitem.data; } loser: + if (rv != SECSuccess) { + SECITEM_FreeItem(&sigitem, PR_FALSE); + } SGN_DestroyDigestInfo(di); if (arena != NULL) { PORT_FreeArena(arena, PR_FALSE); @@ -229,18 +286,14 @@ loser: /************************************************************************/ -/* -** 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) +static SECStatus +sec_SignData(SECItem *res, const unsigned char *buf, int len, + SECKEYPrivateKey *pk, SECOidTag algid, SECItem *params) { SECStatus rv; SGNContext *sgn; - sgn = SGN_NewContext(algid, pk); + sgn = sgn_NewContext(algid, params, pk); if (sgn == NULL) return SECFailure; @@ -260,6 +313,25 @@ loser: 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) +{ + return sec_SignData(res, buf, len, pk, algid, NULL); +} + +SECStatus +SEC_SignDataWithAlgorithmID(SECItem *res, const unsigned char *buf, int len, + SECKEYPrivateKey *pk, SECAlgorithmID *algid) +{ + SECOidTag tag = SECOID_GetAlgorithmTag(algid); + return sec_SignData(res, buf, len, pk, tag, &algid->parameters); +} + /************************************************************************/ DERTemplate CERTSignedDataTemplate[] = @@ -294,10 +366,10 @@ const SEC_ASN1Template CERT_SignedDataTemplate[] = SEC_ASN1_CHOOSER_IMPLEMENT(CERT_SignedDataTemplate) -SECStatus -SEC_DerSignData(PLArenaPool *arena, SECItem *result, +static SECStatus +sec_DerSignData(PLArenaPool *arena, SECItem *result, const unsigned char *buf, int len, SECKEYPrivateKey *pk, - SECOidTag algID) + SECOidTag algID, SECItem *params) { SECItem it; CERTSignedData sd; @@ -339,7 +411,7 @@ SEC_DerSignData(PLArenaPool *arena, SECItem *result, } /* Sign input buffer */ - rv = SEC_SignData(&it, buf, len, pk, algID); + rv = sec_SignData(&it, buf, len, pk, algID, params); if (rv) goto loser; @@ -349,7 +421,7 @@ SEC_DerSignData(PLArenaPool *arena, SECItem *result, 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); + rv = SECOID_SetAlgorithmID(arena, &sd.signatureAlgorithm, algID, params); if (rv) goto loser; @@ -363,6 +435,24 @@ loser: } SECStatus +SEC_DerSignData(PLArenaPool *arena, SECItem *result, + const unsigned char *buf, int len, SECKEYPrivateKey *pk, + SECOidTag algID) +{ + return sec_DerSignData(arena, result, buf, len, pk, algID, NULL); +} + +SECStatus +SEC_DerSignDataWithAlgorithmID(PLArenaPool *arena, SECItem *result, + const unsigned char *buf, int len, + SECKEYPrivateKey *pk, + SECAlgorithmID *algID) +{ + SECOidTag tag = SECOID_GetAlgorithmTag(algID); + return sec_DerSignData(arena, result, buf, len, pk, tag, &algID->parameters); +} + +SECStatus SGN_Digest(SECKEYPrivateKey *privKey, SECOidTag algtag, SECItem *result, SECItem *digest) { @@ -509,3 +599,243 @@ SEC_GetSignatureAlgorithmOidTag(KeyType keyType, SECOidTag hashAlgTag) } return sigTag; } + +static SECItem * +sec_CreateRSAPSSParameters(PLArenaPool *arena, + SECItem *result, + SECOidTag hashAlgTag, + const SECItem *params, + const SECKEYPrivateKey *key) +{ + SECKEYRSAPSSParams pssParams; + int modBytes, hashLength; + unsigned long saltLength; + PRBool defaultSHA1 = PR_FALSE; + SECStatus rv; + + if (key->keyType != rsaKey && key->keyType != rsaPssKey) { + PORT_SetError(SEC_ERROR_INVALID_ALGORITHM); + return NULL; + } + + PORT_Memset(&pssParams, 0, sizeof(pssParams)); + + if (params && params->data) { + /* The parameters field should either be empty or contain + * valid RSA-PSS parameters */ + PORT_Assert(!(params->len == 2 && + params->data[0] == SEC_ASN1_NULL && + params->data[1] == 0)); + rv = SEC_QuickDERDecodeItem(arena, &pssParams, + SECKEY_RSAPSSParamsTemplate, + params); + if (rv != SECSuccess) { + return NULL; + } + defaultSHA1 = PR_TRUE; + } + + if (pssParams.trailerField.data) { + unsigned long trailerField; + + rv = SEC_ASN1DecodeInteger((SECItem *)&pssParams.trailerField, + &trailerField); + if (rv != SECSuccess) { + return NULL; + } + if (trailerField != 1) { + PORT_SetError(SEC_ERROR_INVALID_ARGS); + return NULL; + } + } + + modBytes = PK11_GetPrivateModulusLen((SECKEYPrivateKey *)key); + + /* Determine the hash algorithm to use, based on hashAlgTag and + * pssParams.hashAlg; there are four cases */ + if (hashAlgTag != SEC_OID_UNKNOWN) { + SECOidTag tag = SEC_OID_UNKNOWN; + + if (pssParams.hashAlg) { + tag = SECOID_GetAlgorithmTag(pssParams.hashAlg); + } else if (defaultSHA1) { + tag = SEC_OID_SHA1; + } + + if (tag != SEC_OID_UNKNOWN && tag != hashAlgTag) { + PORT_SetError(SEC_ERROR_INVALID_ARGS); + return NULL; + } + } else if (hashAlgTag == SEC_OID_UNKNOWN) { + if (pssParams.hashAlg) { + hashAlgTag = SECOID_GetAlgorithmTag(pssParams.hashAlg); + } else if (defaultSHA1) { + hashAlgTag = SEC_OID_SHA1; + } else { + /* Find a suitable hash algorithm based on the NIST recommendation */ + if (modBytes <= 384) { /* 128, in NIST 800-57, Part 1 */ + hashAlgTag = SEC_OID_SHA256; + } else if (modBytes <= 960) { /* 192, NIST 800-57, Part 1 */ + hashAlgTag = SEC_OID_SHA384; + } else { + hashAlgTag = SEC_OID_SHA512; + } + } + } + + if (hashAlgTag != SEC_OID_SHA1 && hashAlgTag != SEC_OID_SHA224 && + hashAlgTag != SEC_OID_SHA256 && hashAlgTag != SEC_OID_SHA384 && + hashAlgTag != SEC_OID_SHA512) { + PORT_SetError(SEC_ERROR_INVALID_ALGORITHM); + return NULL; + } + + /* Now that the hash algorithm is decided, check if it matches the + * existing parameters if any */ + if (pssParams.maskAlg) { + SECAlgorithmID maskHashAlg; + + if (SECOID_GetAlgorithmTag(pssParams.maskAlg) != SEC_OID_PKCS1_MGF1) { + PORT_SetError(SEC_ERROR_INVALID_ALGORITHM); + return NULL; + } + + if (pssParams.maskAlg->parameters.data == NULL) { + PORT_SetError(SEC_ERROR_INVALID_ALGORITHM); + return NULL; + } + + PORT_Memset(&maskHashAlg, 0, sizeof(maskHashAlg)); + rv = SEC_QuickDERDecodeItem(arena, &maskHashAlg, + SEC_ASN1_GET(SECOID_AlgorithmIDTemplate), + &pssParams.maskAlg->parameters); + if (rv != SECSuccess) { + return NULL; + } + + /* Following the recommendation in RFC 4055, assume the hash + * algorithm identical to pssParam.hashAlg */ + if (SECOID_GetAlgorithmTag(&maskHashAlg) != hashAlgTag) { + PORT_SetError(SEC_ERROR_INVALID_ALGORITHM); + return NULL; + } + } else if (defaultSHA1) { + if (hashAlgTag != SEC_OID_SHA1) { + PORT_SetError(SEC_ERROR_INVALID_ALGORITHM); + return NULL; + } + } + + hashLength = HASH_ResultLenByOidTag(hashAlgTag); + + if (pssParams.saltLength.data) { + rv = SEC_ASN1DecodeInteger((SECItem *)&pssParams.saltLength, + &saltLength); + if (rv != SECSuccess) { + return NULL; + } + + /* The specified salt length is too long */ + if (saltLength > modBytes - hashLength - 2) { + PORT_SetError(SEC_ERROR_INVALID_ARGS); + return NULL; + } + } else if (defaultSHA1) { + saltLength = 20; + } + + /* Fill in the parameters */ + if (pssParams.hashAlg) { + if (hashAlgTag == SEC_OID_SHA1) { + /* Omit hashAlg if the the algorithm is SHA-1 (default) */ + pssParams.hashAlg = NULL; + } + } else { + if (hashAlgTag != SEC_OID_SHA1) { + pssParams.hashAlg = PORT_ArenaZAlloc(arena, sizeof(SECAlgorithmID)); + if (!pssParams.hashAlg) { + return NULL; + } + rv = SECOID_SetAlgorithmID(arena, pssParams.hashAlg, hashAlgTag, + NULL); + if (rv != SECSuccess) { + return NULL; + } + } + } + + if (pssParams.maskAlg) { + if (hashAlgTag == SEC_OID_SHA1) { + /* Omit maskAlg if the the algorithm is SHA-1 (default) */ + pssParams.maskAlg = NULL; + } + } else { + if (hashAlgTag != SEC_OID_SHA1) { + SECItem *hashAlgItem; + + PORT_Assert(pssParams.hashAlg != NULL); + + hashAlgItem = SEC_ASN1EncodeItem(arena, NULL, pssParams.hashAlg, + SEC_ASN1_GET(SECOID_AlgorithmIDTemplate)); + if (!hashAlgItem) { + return NULL; + } + pssParams.maskAlg = PORT_ArenaZAlloc(arena, sizeof(SECAlgorithmID)); + if (!pssParams.maskAlg) { + return NULL; + } + rv = SECOID_SetAlgorithmID(arena, pssParams.maskAlg, + SEC_OID_PKCS1_MGF1, hashAlgItem); + if (rv != SECSuccess) { + return NULL; + } + } + } + + if (pssParams.saltLength.data) { + if (saltLength == 20) { + /* Omit the salt length if it is the default */ + pssParams.saltLength.data = NULL; + } + } else { + /* Find a suitable length from the hash algorithm and modulus bits */ + saltLength = PR_MIN(hashLength, modBytes - hashLength - 2); + + if (saltLength != 20 && + !SEC_ASN1EncodeInteger(arena, &pssParams.saltLength, saltLength)) { + return NULL; + } + } + + if (pssParams.trailerField.data) { + /* Omit trailerField if the value is 1 (default) */ + pssParams.trailerField.data = NULL; + } + + return SEC_ASN1EncodeItem(arena, result, + &pssParams, SECKEY_RSAPSSParamsTemplate); +} + +SECItem * +SEC_CreateSignatureAlgorithmParameters(PLArenaPool *arena, + SECItem *result, + SECOidTag signAlgTag, + SECOidTag hashAlgTag, + const SECItem *params, + const SECKEYPrivateKey *key) +{ + switch (signAlgTag) { + case SEC_OID_PKCS1_RSA_PSS_SIGNATURE: + return sec_CreateRSAPSSParameters(arena, result, + hashAlgTag, params, key); + + default: + if (params == NULL) + return NULL; + if (result == NULL) + result = SECITEM_AllocItem(arena, NULL, 0); + if (SECITEM_CopyItem(arena, result, params) != SECSuccess) + return NULL; + return result; + } +} |