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comparison: security/pkix/lib/pkixkey.cpp
security/pkix/lib/pkixkey.cpp
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| 1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */ | |
| 3 /* Copyright 2013 Mozilla Foundation | |
| 4 * | |
| 5 * Licensed under the Apache License, Version 2.0 (the "License"); | |
| 6 * you may not use this file except in compliance with the License. | |
| 7 * You may obtain a copy of the License at | |
| 8 * | |
| 9 * http://www.apache.org/licenses/LICENSE-2.0 | |
| 10 * | |
| 11 * Unless required by applicable law or agreed to in writing, software | |
| 12 * distributed under the License is distributed on an "AS IS" BASIS, | |
| 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 14 * See the License for the specific language governing permissions and | |
| 15 * limitations under the License. | |
| 16 */ | |
| 17 | |
| 18 #include "pkix/pkix.h" | |
| 19 | |
| 20 #include <limits> | |
| 21 #include <stdint.h> | |
| 22 | |
| 23 #include "cert.h" | |
| 24 #include "cryptohi.h" | |
| 25 #include "prerror.h" | |
| 26 #include "secerr.h" | |
| 27 | |
| 28 namespace mozilla { namespace pkix { | |
| 29 | |
| 30 SECStatus | |
| 31 VerifySignedData(const CERTSignedData* sd, const CERTCertificate* cert, | |
| 32 void* pkcs11PinArg) | |
| 33 { | |
| 34 if (!sd || !sd->data.data || !sd->signatureAlgorithm.algorithm.data || | |
| 35 !sd->signature.data || !cert) { | |
| 36 PR_NOT_REACHED("invalid args to VerifySignedData"); | |
| 37 PR_SetError(SEC_ERROR_INVALID_ARGS, 0); | |
| 38 return SECFailure; | |
| 39 } | |
| 40 | |
| 41 // See bug 921585. | |
| 42 if (sd->data.len > static_cast<unsigned int>(std::numeric_limits<int>::max())) { | |
| 43 PR_SetError(SEC_ERROR_INVALID_ARGS, 0); | |
| 44 return SECFailure; | |
| 45 } | |
| 46 | |
| 47 // convert sig->len from bit counts to byte count. | |
| 48 SECItem sig = sd->signature; | |
| 49 DER_ConvertBitString(&sig); | |
| 50 | |
| 51 // Use SECKEY_ExtractPublicKey instead of CERT_ExtractPublicKey because | |
| 52 // CERT_ExtractPublicKey would try to do (EC)DSA parameter inheritance, using | |
| 53 // the classic (wrong) NSS path building logic. We intentionally do not | |
| 54 // support parameter inheritance. | |
| 55 ScopedSECKEYPublicKey | |
| 56 pubKey(SECKEY_ExtractPublicKey(&cert->subjectPublicKeyInfo)); | |
| 57 if (!pubKey) { | |
| 58 return SECFailure; | |
| 59 } | |
| 60 | |
| 61 SECOidTag hashAlg; | |
| 62 if (VFY_VerifyDataWithAlgorithmID(sd->data.data, static_cast<int>(sd->data.len), | |
| 63 pubKey.get(), &sig, &sd->signatureAlgorithm, | |
| 64 &hashAlg, pkcs11PinArg) != SECSuccess) { | |
| 65 return SECFailure; | |
| 66 } | |
| 67 | |
| 68 // TODO: Ideally, we would do this check before we call | |
| 69 // VFY_VerifyDataWithAlgorithmID. But, VFY_VerifyDataWithAlgorithmID gives us | |
| 70 // the hash algorithm so it is more convenient to do things in this order. | |
| 71 uint32_t policy; | |
| 72 if (NSS_GetAlgorithmPolicy(hashAlg, &policy) != SECSuccess) { | |
| 73 return SECFailure; | |
| 74 } | |
| 75 | |
| 76 // XXX: I'm not sure why there isn't NSS_USE_ALG_IN_SSL_SIGNATURE, but there | |
| 77 // isn't. Since we don't know the context in which we're being called, be as | |
| 78 // strict as we can be given the NSS API that is available. | |
| 79 static const uint32_t requiredPolicy = NSS_USE_ALG_IN_CERT_SIGNATURE | | |
| 80 NSS_USE_ALG_IN_CMS_SIGNATURE; | |
| 81 if ((policy & requiredPolicy) != requiredPolicy) { | |
| 82 PR_SetError(SEC_ERROR_CERT_SIGNATURE_ALGORITHM_DISABLED, 0); | |
| 83 return SECFailure; | |
| 84 } | |
| 85 | |
| 86 return SECSuccess; | |
| 87 } | |
| 88 | |
| 89 } } // namespace mozilla::pkix |
