diff options
Diffstat (limited to 'vendor/github.com/fullsailor/pkcs7/x509.go')
| -rw-r--r-- | vendor/github.com/fullsailor/pkcs7/x509.go | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/vendor/github.com/fullsailor/pkcs7/x509.go b/vendor/github.com/fullsailor/pkcs7/x509.go new file mode 100644 index 000000000..195fd0e4b --- /dev/null +++ b/vendor/github.com/fullsailor/pkcs7/x509.go @@ -0,0 +1,133 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the go/golang LICENSE file. + +package pkcs7 + +// These are private constants and functions from the crypto/x509 package that +// are useful when dealing with signatures verified by x509 certificates + +import ( + "bytes" + "crypto" + "crypto/x509" + "crypto/x509/pkix" + "encoding/asn1" +) + +var ( + oidSignatureMD2WithRSA = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 2} + oidSignatureMD5WithRSA = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 4} + oidSignatureSHA1WithRSA = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 5} + oidSignatureSHA256WithRSA = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 11} + oidSignatureSHA384WithRSA = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 12} + oidSignatureSHA512WithRSA = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 13} + oidSignatureRSAPSS = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 10} + oidSignatureDSAWithSHA1 = asn1.ObjectIdentifier{1, 2, 840, 10040, 4, 3} + oidSignatureDSAWithSHA256 = asn1.ObjectIdentifier{2, 16, 840, 1, 101, 3, 4, 3, 2} + oidSignatureECDSAWithSHA1 = asn1.ObjectIdentifier{1, 2, 840, 10045, 4, 1} + oidSignatureECDSAWithSHA256 = asn1.ObjectIdentifier{1, 2, 840, 10045, 4, 3, 2} + oidSignatureECDSAWithSHA384 = asn1.ObjectIdentifier{1, 2, 840, 10045, 4, 3, 3} + oidSignatureECDSAWithSHA512 = asn1.ObjectIdentifier{1, 2, 840, 10045, 4, 3, 4} + + oidSHA256 = asn1.ObjectIdentifier{2, 16, 840, 1, 101, 3, 4, 2, 1} + oidSHA384 = asn1.ObjectIdentifier{2, 16, 840, 1, 101, 3, 4, 2, 2} + oidSHA512 = asn1.ObjectIdentifier{2, 16, 840, 1, 101, 3, 4, 2, 3} + + oidMGF1 = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 8} + + // oidISOSignatureSHA1WithRSA means the same as oidSignatureSHA1WithRSA + // but it's specified by ISO. Microsoft's makecert.exe has been known + // to produce certificates with this OID. + oidISOSignatureSHA1WithRSA = asn1.ObjectIdentifier{1, 3, 14, 3, 2, 29} +) + +var signatureAlgorithmDetails = []struct { + algo x509.SignatureAlgorithm + name string + oid asn1.ObjectIdentifier + pubKeyAlgo x509.PublicKeyAlgorithm + hash crypto.Hash +}{ + {x509.MD2WithRSA, "MD2-RSA", oidSignatureMD2WithRSA, x509.RSA, crypto.Hash(0) /* no value for MD2 */}, + {x509.MD5WithRSA, "MD5-RSA", oidSignatureMD5WithRSA, x509.RSA, crypto.MD5}, + {x509.SHA1WithRSA, "SHA1-RSA", oidSignatureSHA1WithRSA, x509.RSA, crypto.SHA1}, + {x509.SHA1WithRSA, "SHA1-RSA", oidISOSignatureSHA1WithRSA, x509.RSA, crypto.SHA1}, + {x509.SHA256WithRSA, "SHA256-RSA", oidSignatureSHA256WithRSA, x509.RSA, crypto.SHA256}, + {x509.SHA384WithRSA, "SHA384-RSA", oidSignatureSHA384WithRSA, x509.RSA, crypto.SHA384}, + {x509.SHA512WithRSA, "SHA512-RSA", oidSignatureSHA512WithRSA, x509.RSA, crypto.SHA512}, + {x509.SHA256WithRSAPSS, "SHA256-RSAPSS", oidSignatureRSAPSS, x509.RSA, crypto.SHA256}, + {x509.SHA384WithRSAPSS, "SHA384-RSAPSS", oidSignatureRSAPSS, x509.RSA, crypto.SHA384}, + {x509.SHA512WithRSAPSS, "SHA512-RSAPSS", oidSignatureRSAPSS, x509.RSA, crypto.SHA512}, + {x509.DSAWithSHA1, "DSA-SHA1", oidSignatureDSAWithSHA1, x509.DSA, crypto.SHA1}, + {x509.DSAWithSHA256, "DSA-SHA256", oidSignatureDSAWithSHA256, x509.DSA, crypto.SHA256}, + {x509.ECDSAWithSHA1, "ECDSA-SHA1", oidSignatureECDSAWithSHA1, x509.ECDSA, crypto.SHA1}, + {x509.ECDSAWithSHA256, "ECDSA-SHA256", oidSignatureECDSAWithSHA256, x509.ECDSA, crypto.SHA256}, + {x509.ECDSAWithSHA384, "ECDSA-SHA384", oidSignatureECDSAWithSHA384, x509.ECDSA, crypto.SHA384}, + {x509.ECDSAWithSHA512, "ECDSA-SHA512", oidSignatureECDSAWithSHA512, x509.ECDSA, crypto.SHA512}, +} + +// pssParameters reflects the parameters in an AlgorithmIdentifier that +// specifies RSA PSS. See https://tools.ietf.org/html/rfc3447#appendix-A.2.3 +type pssParameters struct { + // The following three fields are not marked as + // optional because the default values specify SHA-1, + // which is no longer suitable for use in signatures. + Hash pkix.AlgorithmIdentifier `asn1:"explicit,tag:0"` + MGF pkix.AlgorithmIdentifier `asn1:"explicit,tag:1"` + SaltLength int `asn1:"explicit,tag:2"` + TrailerField int `asn1:"optional,explicit,tag:3,default:1"` +} + +// asn1.NullBytes is not available prior to Go 1.9 +var nullBytes = []byte{5, 0} + +func getSignatureAlgorithmFromAI(ai pkix.AlgorithmIdentifier) x509.SignatureAlgorithm { + if !ai.Algorithm.Equal(oidSignatureRSAPSS) { + for _, details := range signatureAlgorithmDetails { + if ai.Algorithm.Equal(details.oid) { + return details.algo + } + } + return x509.UnknownSignatureAlgorithm + } + + // RSA PSS is special because it encodes important parameters + // in the Parameters. + + var params pssParameters + if _, err := asn1.Unmarshal(ai.Parameters.FullBytes, ¶ms); err != nil { + return x509.UnknownSignatureAlgorithm + } + + var mgf1HashFunc pkix.AlgorithmIdentifier + if _, err := asn1.Unmarshal(params.MGF.Parameters.FullBytes, &mgf1HashFunc); err != nil { + return x509.UnknownSignatureAlgorithm + } + + // PSS is greatly overburdened with options. This code forces + // them into three buckets by requiring that the MGF1 hash + // function always match the message hash function (as + // recommended in + // https://tools.ietf.org/html/rfc3447#section-8.1), that the + // salt length matches the hash length, and that the trailer + // field has the default value. + if !bytes.Equal(params.Hash.Parameters.FullBytes, nullBytes) || + !params.MGF.Algorithm.Equal(oidMGF1) || + !mgf1HashFunc.Algorithm.Equal(params.Hash.Algorithm) || + !bytes.Equal(mgf1HashFunc.Parameters.FullBytes, nullBytes) || + params.TrailerField != 1 { + return x509.UnknownSignatureAlgorithm + } + + switch { + case params.Hash.Algorithm.Equal(oidSHA256) && params.SaltLength == 32: + return x509.SHA256WithRSAPSS + case params.Hash.Algorithm.Equal(oidSHA384) && params.SaltLength == 48: + return x509.SHA384WithRSAPSS + case params.Hash.Algorithm.Equal(oidSHA512) && params.SaltLength == 64: + return x509.SHA512WithRSAPSS + } + + return x509.UnknownSignatureAlgorithm +} |