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crypto/tls: add RSASSA-PSS support for handshake messages

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This adds support for RSASSA-PSS signatures in handshake messages as
required by TLS 1.3. Even if TLS 1.2 is negotiated, it must support PSS
when advertised in the Client Hello (this will be done later as the
testdata will change).

Updates #9671

Change-Id: I8006b92e017453ae408c153233ce5ccef99b5c3f
Reviewed-on: https://go-review.googlesource.com/79736
Reviewed-by: Filippo Valsorda <filippo@golang.org>
This commit is contained in:
Peter Wu 2017-11-22 19:27:20 +00:00 • committed by Filippo Valsorda
parent 611a58ad27
commit 0524876ddb
8 changed files with 90 additions and 25 deletions
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21
auth_test.go
View file

@ -13,6 +13,7 @@ func TestSignatureSelection(t *testing.T) {
rsaCert := &testRSAPrivateKey.PublicKey
ecdsaCert := &testECDSAPrivateKey.PublicKey
sigsPKCS1WithSHA := []SignatureScheme{PKCS1WithSHA256, PKCS1WithSHA1}
sigsPSSWithSHA := []SignatureScheme{PSSWithSHA256, PSSWithSHA384}
sigsECDSAWithSHA := []SignatureScheme{ECDSAWithP256AndSHA256, ECDSAWithSHA1}
tests := []struct {
@ -27,30 +28,34 @@ func TestSignatureSelection(t *testing.T) {
}{
// Hash is fixed for RSA in TLS 1.1 and before.
// https://tools.ietf.org/html/rfc4346#page-44
{rsaCert, nil, nil, VersionTLS11, 0, signatureRSA, crypto.MD5SHA1},
{rsaCert, nil, nil, VersionTLS10, 0, signatureRSA, crypto.MD5SHA1},
{rsaCert, nil, nil, VersionSSL30, 0, signatureRSA, crypto.MD5SHA1},
{rsaCert, nil, nil, VersionTLS11, 0, signaturePKCS1v15, crypto.MD5SHA1},
{rsaCert, nil, nil, VersionTLS10, 0, signaturePKCS1v15, crypto.MD5SHA1},
{rsaCert, nil, nil, VersionSSL30, 0, signaturePKCS1v15, crypto.MD5SHA1},
// Before TLS 1.2, there is no signature_algorithms extension
// nor field in CertificateRequest and digitally-signed and thus
// it should be ignored.
{rsaCert, sigsPKCS1WithSHA, nil, VersionTLS11, 0, signatureRSA, crypto.MD5SHA1},
{rsaCert, sigsPKCS1WithSHA, sigsPKCS1WithSHA, VersionTLS11, 0, signatureRSA, crypto.MD5SHA1},
{rsaCert, sigsPKCS1WithSHA, nil, VersionTLS11, 0, signaturePKCS1v15, crypto.MD5SHA1},
{rsaCert, sigsPKCS1WithSHA, sigsPKCS1WithSHA, VersionTLS11, 0, signaturePKCS1v15, crypto.MD5SHA1},
// Use SHA-1 for TLS 1.0 and 1.1 with ECDSA, see https://tools.ietf.org/html/rfc4492#page-20
{ecdsaCert, sigsPKCS1WithSHA, sigsPKCS1WithSHA, VersionTLS11, 0, signatureECDSA, crypto.SHA1},
{ecdsaCert, sigsPKCS1WithSHA, sigsPKCS1WithSHA, VersionTLS10, 0, signatureECDSA, crypto.SHA1},
// TLS 1.2 without signature_algorithms extension
// https://tools.ietf.org/html/rfc5246#page-47
{rsaCert, nil, sigsPKCS1WithSHA, VersionTLS12, PKCS1WithSHA1, signatureRSA, crypto.SHA1},
{rsaCert, nil, sigsPKCS1WithSHA, VersionTLS12, PKCS1WithSHA1, signaturePKCS1v15, crypto.SHA1},
{ecdsaCert, nil, sigsPKCS1WithSHA, VersionTLS12, ECDSAWithSHA1, signatureECDSA, crypto.SHA1},
{rsaCert, []SignatureScheme{PKCS1WithSHA1}, sigsPKCS1WithSHA, VersionTLS12, PKCS1WithSHA1, signatureRSA, crypto.SHA1},
{rsaCert, []SignatureScheme{PKCS1WithSHA256}, sigsPKCS1WithSHA, VersionTLS12, PKCS1WithSHA256, signatureRSA, crypto.SHA256},
{rsaCert, []SignatureScheme{PKCS1WithSHA1}, sigsPKCS1WithSHA, VersionTLS12, PKCS1WithSHA1, signaturePKCS1v15, crypto.SHA1},
{rsaCert, []SignatureScheme{PKCS1WithSHA256}, sigsPKCS1WithSHA, VersionTLS12, PKCS1WithSHA256, signaturePKCS1v15, crypto.SHA256},
// "sha_hash" may denote hashes other than SHA-1
// https://tools.ietf.org/html/draft-ietf-tls-rfc4492bis-17#page-17
{ecdsaCert, []SignatureScheme{ECDSAWithSHA1}, sigsECDSAWithSHA, VersionTLS12, ECDSAWithSHA1, signatureECDSA, crypto.SHA1},
{ecdsaCert, []SignatureScheme{ECDSAWithP256AndSHA256}, sigsECDSAWithSHA, VersionTLS12, ECDSAWithP256AndSHA256, signatureECDSA, crypto.SHA256},
// RSASSA-PSS is defined in TLS 1.3 for TLS 1.2
// https://tools.ietf.org/html/draft-ietf-tls-tls13-21#page-45
{rsaCert, []SignatureScheme{PSSWithSHA256}, sigsPSSWithSHA, VersionTLS12, PSSWithSHA256, signatureRSAPSS, crypto.SHA256},
}
for testNo, test := range tests {