crypto/internal/fips140test: add TLS-v1.2 ACVP tests

Adds ACVP test coverage for the SP 800-135rev1 RFC 7627 TLS v1.2 KDF
based on the NIST spec:

  https://pages.nist.gov/ACVP/draft-celi-acvp-kdf-tls.html

Only SHA2-256, SHA2-384 and SHA2-512 are valid hash algorithms for the
TLSKDF algorithm.

Updates #69642

Change-Id: I553d4f6a1d6652ed486af0e2c94730c8063fb47f
Reviewed-on: https://go-review.googlesource.com/c/go/+/636116
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Roland Shoemaker <roland@golang.org>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
Auto-Submit: Filippo Valsorda <filippo@golang.org>
Reviewed-by: David Chase <drchase@google.com>

3 files changed, 30 insertions, 2 deletions

diff --git a/src/crypto/internal/fips140test/acvp_capabilities.json b/src/crypto/internal/fips140test/acvp_capabilities.json
index 7577e76c92..74317deb41 100644
--- a/src/crypto/internal/fips140test/acvp_capabilities.json
+++ b/src/crypto/internal/fips140test/acvp_capabilities.json
@@ -59,5 +59,7 @@
   {"algorithm":"ACVP-AES-CTR","direction":["encrypt","decrypt"],"keyLen":[128,192,256],"payloadLen":[{"min":8,"max":128,"increment":8}],"incrementalCounter":true,"overflowCounter":true,"performCounterTests":true,"revision":"1.0"},
   {"algorithm":"ACVP-AES-GCM","direction":["encrypt","decrypt"],"keyLen":[128,192,256],"payloadLen":[{"min":0,"max":65536,"increment":8}],"aadLen":[{"min":0,"max":65536,"increment":8}],"tagLen":[96,104,112,120,128],"ivLen":[96],"ivGen":"external","revision":"1.0"},
   {"algorithm":"ACVP-AES-GCM","direction":["encrypt","decrypt"],"keyLen":[128,192,256],"payloadLen":[{"min":0,"max":65536,"increment":8}],"aadLen":[{"min":0,"max":65536,"increment":8}],"tagLen":[128],"ivLen":[96],"ivGen":"internal","ivGenMode":"8.2.2","revision":"1.0"},
-  {"algorithm":"CMAC-AES","capabilities":[{"direction":["gen","ver"],"msgLen":[{"min":0,"max":524288,"increment":8}],"keyLen":[128,256],"macLen":[{"min":8,"max":128,"increment":8}]}],"revision":"1.0"}
+  {"algorithm":"CMAC-AES","capabilities":[{"direction":["gen","ver"],"msgLen":[{"min":0,"max":524288,"increment":8}],"keyLen":[128,256],"macLen":[{"min":8,"max":128,"increment":8}]}],"revision":"1.0"},
+
+  {"algorithm":"TLS-v1.2","mode":"KDF","revision":"RFC7627","hashAlg":["SHA2-256","SHA2-384","SHA2-512"]}
 ]
diff --git a/src/crypto/internal/fips140test/acvp_test.config.json b/src/crypto/internal/fips140test/acvp_test.config.json
index 2be909f1a4..a25d38fd68 100644
--- a/src/crypto/internal/fips140test/acvp_test.config.json
+++ b/src/crypto/internal/fips140test/acvp_test.config.json
@@ -42,5 +42,7 @@
   {"Wrapper": "go", "In": "vectors/ACVP-AES-CTR.bz2", "Out": "expected/ACVP-AES-CTR.bz2"},
   {"Wrapper": "go", "In": "vectors/ACVP-AES-GCM.bz2", "Out": "expected/ACVP-AES-GCM.bz2"},
 
-  {"Wrapper": "go", "In": "vectors/CMAC-AES.bz2", "Out": "expected/CMAC-AES.bz2"}
+  {"Wrapper": "go", "In": "vectors/CMAC-AES.bz2", "Out": "expected/CMAC-AES.bz2"},
+
+  {"Wrapper": "go", "In": "vectors/TLS-v1.2.bz2", "Out": "expected/TLS-v1.2.bz2"}
 ]
diff --git a/src/crypto/internal/fips140test/acvp_test.go b/src/crypto/internal/fips140test/acvp_test.go
index 7e3ab4031e..97c0c26aed 100644
--- a/src/crypto/internal/fips140test/acvp_test.go
+++ b/src/crypto/internal/fips140test/acvp_test.go
@@ -37,6 +37,7 @@ import (
 	"crypto/internal/fips140/sha3"
 	"crypto/internal/fips140/sha512"
 	"crypto/internal/fips140/subtle"
+	"crypto/internal/fips140/tls12"
 	"crypto/rand"
 	_ "embed"
 	"encoding/binary"
@@ -114,6 +115,8 @@ var (
 	//   https://pages.nist.gov/ACVP/draft-celi-acvp-symmetric.html#section-7.3
 	// HKDF KDA algorithm capabilities:
 	//   https://pages.nist.gov/ACVP/draft-hammett-acvp-kas-kdf-hkdf.html#section-7.3
+	// TLS 1.2 KDF algorithm capabilities:
+	//   https://pages.nist.gov/ACVP/draft-celi-acvp-kdf-tls.html#section-7.2
 	//go:embed acvp_capabilities.json
 	capabilitiesJson []byte
 
@@ -220,6 +223,12 @@ var (
 
 		"CMAC-AES":        cmdCmacAesAft(),
 		"CMAC-AES/verify": cmdCmacAesVerifyAft(),
+
+		// Note: Only SHA2-256, SHA2-384 and SHA2-512 are valid hash functions for TLSKDF.
+		// 		 See https://pages.nist.gov/ACVP/draft-celi-acvp-kdf-tls.html#section-7.2.1
+		"TLSKDF/1.2/SHA2-256": cmdTlsKdf12Aft(func() fips140.Hash { return sha256.New() }),
+		"TLSKDF/1.2/SHA2-384": cmdTlsKdf12Aft(func() fips140.Hash { return sha512.New384() }),
+		"TLSKDF/1.2/SHA2-512": cmdTlsKdf12Aft(func() fips140.Hash { return sha512.New() }),
 	}
 )
 
@@ -1314,6 +1323,21 @@ func cmdCmacAesVerifyAft() command {
 	}
 }
 
+func cmdTlsKdf12Aft(h func() fips140.Hash) command {
+	return command{
+		requiredArgs: 5, // Number output bytes, secret, label, seed1, seed2
+		handler: func(args [][]byte) ([][]byte, error) {
+			outputLen := binary.LittleEndian.Uint32(args[0])
+			secret := args[1]
+			label := string(args[2])
+			seed1 := args[3]
+			seed2 := args[4]
+
+			return [][]byte{tls12.PRF(h, secret, label, append(seed1, seed2...), int(outputLen))}, nil
+		},
+	}
+}
+
 func TestACVP(t *testing.T) {
 	testenv.SkipIfShortAndSlow(t)