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// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. | ||
// SPDX-License-Identifier: Apache-2.0 OR ISC | ||
package subprocess | ||
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import ( | ||
"encoding/json" | ||
"fmt" | ||
) | ||
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type kdaPrimitive struct { | ||
modes map[string]kdaModePrimitive | ||
} | ||
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type kdaModePrimitive interface { | ||
ProcessKDA(vectorSet []byte, t Transactable) (interface{}, error) | ||
} | ||
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func (k *kdaPrimitive) Process(vectorSet []byte, t Transactable) (interface{}, error) { | ||
var partial struct { | ||
Mode string `json:"mode"` | ||
} | ||
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if err := json.Unmarshal(vectorSet, &partial); err != nil { | ||
return nil, err | ||
} | ||
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prim, ok := k.modes[partial.Mode] | ||
if !ok { | ||
return nil, fmt.Errorf("unsupported KDA mode(%v)", partial.Mode) | ||
} | ||
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return prim.ProcessKDA(vectorSet, t) | ||
} |
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// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. | ||
// SPDX-License-Identifier: Apache-2.0 OR ISC | ||
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package subprocess | ||
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import ( | ||
"bytes" | ||
"encoding/json" | ||
"fmt" | ||
"strings" | ||
) | ||
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// Processes Vectors defined by https://pages.nist.gov/ACVP/draft-hammett-acvp-kas-kdf-onestep.html | ||
type kdaOneStepMode struct{} | ||
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func (k *kdaOneStepMode) ProcessKDA(vectorSet []byte, m Transactable) (interface{}, error) { | ||
var parsed kdaOneStepTestVectorSet | ||
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if err := json.Unmarshal(vectorSet, &parsed); err != nil { | ||
return nil, err | ||
} | ||
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var respGroups []kdaOneStepTestGroupResponse | ||
for _, group := range parsed.Groups { | ||
group := group | ||
groupResp := kdaOneStepTestGroupResponse{ID: group.ID} | ||
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// determine the test type | ||
var isValidationTest bool | ||
switch group.Type { | ||
case "VAL": | ||
isValidationTest = true | ||
case "AFT": | ||
isValidationTest = false | ||
default: | ||
return nil, fmt.Errorf("unknown test type %q", group.Type) | ||
} | ||
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// get the number of bytes to output and the auxillary function we're using | ||
outBytes, auxFunctionName, auxFuncType, err := group.Configuration.extract() | ||
if err != nil { | ||
return nil, err | ||
} | ||
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for _, test := range group.Tests { | ||
test := test | ||
testResp := kdaOneStepTestCaseResponse{ID: test.ID} | ||
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info := test.fixedInfoBytes() | ||
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var args [][]byte | ||
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args = append(args, test.KDFParameter.Z) | ||
if auxFuncType == hmacAuxFunction { | ||
args = append(args, test.KDFParameter.Salt) | ||
} | ||
args = append(args, info) | ||
args = append(args, uint32le(outBytes)) | ||
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resp, err := m.Transact("KDA/OneStep/"+auxFunctionName, 1, args...) | ||
if err != nil { | ||
return nil, fmt.Errorf("KDA_OneStep operation failed: %s", err) | ||
} | ||
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if isValidationTest { | ||
passed := bytes.Equal(test.DerivedKeyMaterial, resp[0]) | ||
testResp.Passed = &passed | ||
} else { | ||
testResp.DerivedKeyMaterial = resp[0] | ||
} | ||
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groupResp.Tests = append(groupResp.Tests, testResp) | ||
} | ||
respGroups = append(respGroups, groupResp) | ||
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} | ||
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return respGroups, nil | ||
} | ||
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type kdaOneStepTestVectorSet struct { | ||
Groups []kdaOneStepTestGroup `json:"testGroups"` | ||
} | ||
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type kdaOneStepTestGroup struct { | ||
ID uint64 `json:"tgId"` | ||
Type string `json:"testType"` | ||
Configuration kdaOneStepConfiguration `json:"kdfConfiguration"` | ||
Tests []kdaOneStepTest `json:"tests"` | ||
} | ||
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type kdaOneStepConfiguration struct { | ||
Type string `json:"kdfType"` | ||
SaltMethod string `json:"saltMethod"` | ||
FixedInfoPattern string `json:"fixedInfoPattern"` | ||
FixedInfoEncoding string `json:"fixedInfoEncoding"` | ||
AuxFunction string `json:"auxFunction"` | ||
L uint32 `json:"l"` | ||
} | ||
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func (k *kdaOneStepConfiguration) extract() (outLen uint32, auxFunction string, auxFuncType auxFunctionType, err error) { | ||
if k.Type != "oneStep" { | ||
return 0, "", unknownAuxFunction, fmt.Errorf("unexpected kdfType: %v", k.Type) | ||
} | ||
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auxFuncType.setFromString(k.AuxFunction) | ||
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if auxFuncType == unknownAuxFunction { | ||
return 0, "", unknownAuxFunction, fmt.Errorf("unknown auxillary function: %v", k.AuxFunction) | ||
} | ||
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if k.FixedInfoPattern != "uPartyInfo||vPartyInfo" || k.FixedInfoEncoding != "concatenation" { | ||
return 0, "", unknownAuxFunction, fmt.Errorf("unsupported FixedInfo construction, pattern(%v) with encoding(%v)", k.FixedInfoPattern, k.FixedInfoEncoding) | ||
} | ||
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return k.L / 8, k.AuxFunction, auxFuncType, nil | ||
} | ||
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type kdaOneStepTest struct { | ||
ID uint64 `json:"tcId"` | ||
KDFParameter struct { | ||
Type string `json:"kdfType"` | ||
Salt hexEncodedByteString `json:"salt,omitempty"` | ||
Z hexEncodedByteString `json:"z"` | ||
} `json:"kdfParameter"` | ||
FixedInfoPartyU kdaOneStepFixedInfoParty `json:"fixedInfoPartyU"` | ||
FixedInfoPartyV kdaOneStepFixedInfoParty `json:"fixedInfoPartyV"` | ||
DerivedKeyMaterial hexEncodedByteString `json:"dkm,omitempty"` | ||
} | ||
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func (k *kdaOneStepTest) fixedInfoBytes() []byte { | ||
uBytes := k.FixedInfoPartyU.concatenatedBytes() | ||
vBytes := k.FixedInfoPartyV.concatenatedBytes() | ||
v := make([]byte, 0, len(uBytes)+len(vBytes)) | ||
v = append(v, uBytes...) | ||
v = append(v, vBytes...) | ||
return v | ||
} | ||
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type kdaOneStepFixedInfoParty struct { | ||
PartyID hexEncodedByteString `json:"partyId"` | ||
EphemeralData hexEncodedByteString `json:"ephemeralData"` | ||
} | ||
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func (k *kdaOneStepFixedInfoParty) concatenatedBytes() []byte { | ||
v := make([]byte, 0, len(k.PartyID)+len(k.EphemeralData)) | ||
v = append(v, k.PartyID...) | ||
v = append(v, k.EphemeralData...) | ||
return v | ||
} | ||
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type kdaOneStepTestGroupResponse struct { | ||
ID uint64 `json:"tgId"` | ||
Tests []kdaOneStepTestCaseResponse `json:"tests"` | ||
} | ||
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type kdaOneStepTestCaseResponse struct { | ||
ID uint64 `json:"tcId"` | ||
Passed *bool `json:"testPassed,omitempty"` | ||
DerivedKeyMaterial hexEncodedByteString `json:"dkm,omitempty"` | ||
} | ||
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type auxFunctionType uint | ||
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func (a *auxFunctionType) setFromString(v string) { | ||
if strings.HasPrefix(v, "HMAC-") { | ||
*a = hmacAuxFunction | ||
} else if strings.HasPrefix(v, "SHA-") || strings.HasPrefix(v, "SHA2-") || strings.HasPrefix(v, "SHA3-") { | ||
*a = digestAuxFunction | ||
} else { | ||
*a = unknownAuxFunction | ||
} | ||
} | ||
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const ( | ||
unknownAuxFunction auxFunctionType = iota | ||
digestAuxFunction | ||
hmacAuxFunction | ||
) |
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