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crypto/tls: advertise support for RSA+SHA1 in TLS 1.2 handshake.

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Despite SHA256 support being required for TLS 1.2 handshakes, some
servers are aborting handshakes that don't offer SHA1 support.

This change adds support for signing TLS 1.2 ServerKeyExchange messages
with SHA1. It does not add support for signing TLS 1.2 client
certificates with SHA1 as that would require the handshake to be
buffered.

Fixes #6618.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/15650043
This commit is contained in:
Adam Langley 2013-10-21 16:35:09 -04:00
parent fae4553a9d
commit efed6f99d2
6 changed files with 218 additions and 157 deletions
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2
src/pkg/crypto/tls/handshake_client.go
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@ -63,7 +63,7 @@ NextCipherSuite:
}
if hello.vers >= VersionTLS12 {
hello.signatureAndHashes = supportedSignatureAlgorithms
hello.signatureAndHashes = supportedSKXSignatureAlgorithms
}
c.writeRecord(recordTypeHandshake, hello.marshal())