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updated inxonsistent comments (#6892)

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Edoardo Ierina 2021-03-22 14:38:22 +00:00 committed by GitHub
parent bf9f4a5c4a
commit bde2d2a8c7
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1 changed files with 3 additions and 6 deletions
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core/src/main/kotlin/net/corda/core/crypto/DigestService.kt
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@ -75,20 +75,17 @@ data class DigestService(val hashAlgorithm: String) {
val zeroHash: SecureHash
get() = SecureHash.zeroHashFor(hashAlgorithm)
// val privacySalt: PrivacySalt
// get() = PrivacySalt.createFor(hashAlgorithm)
/**
* Compute the hash of each serialised component so as to be used as Merkle tree leaf. The resultant output (leaf) is
* calculated using the service's hash algorithm, thus HASH(HASH(nonce || serializedComponent)) for SHA2-256 and other
* algorithms loaded via JCA [MessageDigest], or DigestAlgorithm.preImageResistantDigest(nonce || serializedComponent)
* algorithms loaded via JCA [MessageDigest], or DigestAlgorithm.componentDigest(nonce || serializedComponent)
* otherwise, where nonce is computed from [computeNonce].
*/
fun componentHash(opaqueBytes: OpaqueBytes, privacySalt: PrivacySalt, componentGroupIndex: Int, internalIndex: Int): SecureHash =
componentHash(computeNonce(privacySalt, componentGroupIndex, internalIndex), opaqueBytes)
/** Return the HASH(HASH(nonce || serializedComponent)) for SHA2-256 and other algorithms loaded via JCA [MessageDigest],
* otherwise it's defined by DigestAlgorithm.preImageResistantDigest(nonce || serializedComponent). */
* otherwise it's defined by DigestAlgorithm.componentDigest(nonce || serializedComponent). */
fun componentHash(nonce: SecureHash, opaqueBytes: OpaqueBytes): SecureHash {
val data = nonce.bytes + opaqueBytes.bytes
return SecureHash.componentHashAs(hashAlgorithm, data)
@ -109,7 +106,7 @@ data class DigestService(val hashAlgorithm: String) {
* @param groupIndex the fixed index (ordinal) of this component group.
* @param internalIndex the internal index of this object in its corresponding components list.
* @return HASH(HASH(privacySalt || groupIndex || internalIndex)) for SHA2-256 and other algorithms loaded via JCA [MessageDigest],
* otherwise it's defined by DigestAlgorithm.preImageResistantDigest(privacySalt || groupIndex || internalIndex).
* otherwise it's defined by DigestAlgorithm.nonceDigest(privacySalt || groupIndex || internalIndex).
*/
fun computeNonce(privacySalt: PrivacySalt, groupIndex: Int, internalIndex: Int) : SecureHash {
val data = (privacySalt.bytes + ByteBuffer.allocate(NONCE_SIZE).putInt(groupIndex).putInt(internalIndex).array())