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crypto/internal/fips140test: add CMAC-AES ACVP tests

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Adds ACVP test coverage for CMAC-AES based on the NIST spec:
  https://pages.nist.gov/ACVP/draft-fussell-acvp-mac.html

Updates #69642

Change-Id: Ie731863b84c6f8d74c64daa6a6848354420151b2
Reviewed-on: https://go-review.googlesource.com/c/go/+/635762
Reviewed-by: Roland Shoemaker <roland@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
This commit is contained in:
Daniel McCarney 2024-12-13 14:17:48 -05:00 committed by Filippo Valsorda
parent ff27d270c9
commit ae26a30bb0
3 changed files with 60 additions and 2 deletions
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3
src/crypto/internal/fips140test/acvp_capabilities.json
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@ -53,5 +53,6 @@
{"algorithm":"ACVP-AES-CBC","direction":["encrypt","decrypt"],"keyLen":[128,192,256],"revision":"1.0"},
{"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":"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"}
]

4
src/crypto/internal/fips140test/acvp_test.config.json
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@ -35,5 +35,7 @@
{"Wrapper": "go", "In": "vectors/ACVP-AES-CBC.bz2", "Out": "expected/ACVP-AES-CBC.bz2"},
{"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/ACVP-AES-GCM.bz2", "Out": "expected/ACVP-AES-GCM.bz2"},
{"Wrapper": "go", "In": "vectors/CMAC-AES.bz2", "Out": "expected/CMAC-AES.bz2"}
]

55
src/crypto/internal/fips140test/acvp_test.go
View File

@ -35,6 +35,7 @@ import (
"crypto/internal/fips140/sha256"
"crypto/internal/fips140/sha3"
"crypto/internal/fips140/sha512"
"crypto/internal/fips140/subtle"
"crypto/rand"
_ "embed"
"encoding/binary"
@ -189,6 +190,9 @@ var (
"AES-GCM/open": cmdAesGcmOpen(false),
"AES-GCM-randnonce/seal": cmdAesGcmSeal(true),
"AES-GCM-randnonce/open": cmdAesGcmOpen(true),
"CMAC-AES": cmdCmacAesAft(),
"CMAC-AES/verify": cmdCmacAesVerifyAft(),
}
)
@ -1154,6 +1158,57 @@ func cmdAesGcmOpen(randNonce bool) command {
}
}
func cmdCmacAesAft() command {
return command{
requiredArgs: 3, // Number of output bytes, key, message
handler: func(args [][]byte) ([][]byte, error) {
// safe to truncate to int based on our capabilities describing a max MAC output len of 128 bits.
outputLen := int(binary.LittleEndian.Uint32(args[0]))
key := args[1]
message := args[2]
blockCipher, err := aes.New(key)
if err != nil {
return nil, fmt.Errorf("creating AES block cipher with key len %d: %w", len(key), err)
}
cmac := gcm.NewCMAC(blockCipher)
tag := cmac.MAC(message)
if outputLen > len(tag) {
return nil, fmt.Errorf("invalid output length: expected %d, got %d", outputLen, len(tag))
}
return [][]byte{tag[:outputLen]}, nil
},
}
}
func cmdCmacAesVerifyAft() command {
return command{
requiredArgs: 3, // Key, message, claimed MAC
handler: func(args [][]byte) ([][]byte, error) {
key := args[0]
message := args[1]
claimedMAC := args[2]
blockCipher, err := aes.New(key)
if err != nil {
return nil, fmt.Errorf("creating AES block cipher with key len %d: %w", len(key), err)
}
cmac := gcm.NewCMAC(blockCipher)
tag := cmac.MAC(message)
if subtle.ConstantTimeCompare(tag[:len(claimedMAC)], claimedMAC) != 1 {
return [][]byte{{0}}, nil
}
return [][]byte{{1}}, nil
},
}
}
func TestACVP(t *testing.T) {
testenv.SkipIfShortAndSlow(t)