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fix: upgrade gradle & libs and remove Apollo dependency (#18)
Signed-off-by: Ahmed Moussa <ahmed.moussa@iohk.io>
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71 changes: 71 additions & 0 deletions
71
didpeer/src/commonMain/kotlin/io/iohk/atala/prism/didcomm/didpeer/base16/Base16.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,71 @@ | ||
| package io.iohk.atala.prism.didcomm.didpeer.base16 | ||
|
|
||
| import com.ionspin.kotlin.bignum.integer.BigInteger | ||
| import com.ionspin.kotlin.bignum.integer.Sign | ||
|
|
||
| /** | ||
| * Base16 implementation | ||
| */ | ||
| internal object Base16 { | ||
| private val base: BigInteger = BigInteger.parseString("16") | ||
|
|
||
| /** | ||
| * Encode string to Base16 | ||
| */ | ||
| fun encode(input: ByteArray, encoding: Encoding = Encoding.Standard): String { | ||
| if (input.isEmpty()) { | ||
| return "" | ||
| } | ||
| var bi = BigInteger.fromByteArray(input, Sign.POSITIVE) | ||
| val sb = StringBuilder() | ||
| while (bi >= base) { | ||
| val mod = bi.mod(base) | ||
| sb.insert(0, encoding.alphabet[mod.intValue()]) | ||
| bi = bi.subtract(mod).divide(base) | ||
| } | ||
| sb.insert(0, encoding.alphabet[bi.intValue()]) | ||
| // convert leading zeros. | ||
| for (b in input) { | ||
| if (b.compareTo(0) == 0) { | ||
| sb.insert(0, encoding.alphabet[0]) | ||
| } else { | ||
| break | ||
| } | ||
| } | ||
| return sb.toString() | ||
| } | ||
|
|
||
| /** | ||
| * Decode string to Base16 | ||
| */ | ||
| fun decode(input: String, encoding: Encoding = Encoding.Standard): ByteArray { | ||
| val bytes = decodeToBigInteger(encoding.alphabet, base, input).toByteArray() | ||
| val stripSignByte = bytes.size > 1 && bytes[0].compareTo(0) == 0 && bytes[1] < 0 | ||
| var leadingZeros = 0 | ||
| var i = 0 | ||
| while (input[i] == encoding.alphabet[0]) { | ||
| leadingZeros++ | ||
| i++ | ||
| } | ||
| val tmp = ByteArray(bytes.size - (if (stripSignByte) 1 else 0) + leadingZeros) | ||
| bytes.copyInto( | ||
| tmp, // dest | ||
| 0, // dest offset | ||
| if (stripSignByte) 1 else 0, | ||
| tmp.size - leadingZeros // can be added -1 not sure | ||
| ) | ||
| return tmp | ||
| } | ||
|
|
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| private fun decodeToBigInteger(alphabet: String, base: BigInteger, input: String): BigInteger { | ||
| var bi = BigInteger(0) | ||
| for (i in input.length - 1 downTo 0) { | ||
| val alphaIndex = alphabet.indexOf(input[i]) | ||
| if (alphaIndex == -1) { | ||
| throw IllegalStateException("Illegal character " + input[i] + " at " + i) | ||
| } | ||
| bi = bi.add(BigInteger(alphaIndex.toLong()).multiply(base.pow(input.length - 1 - i))) | ||
| } | ||
| return bi | ||
| } | ||
| } |
37 changes: 37 additions & 0 deletions
37
didpeer/src/commonMain/kotlin/io/iohk/atala/prism/didcomm/didpeer/base16/ByteArrayExt.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,37 @@ | ||
| package io.iohk.atala.prism.didcomm.didpeer.base16 | ||
|
|
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| /** | ||
| * Convert [ByteArray] to [CharArray] | ||
| * @return [CharArray] | ||
| */ | ||
| fun ByteArray.asCharArray(): CharArray { | ||
| val chars = CharArray(size) | ||
| for (i in chars.indices) { | ||
| chars[i] = get(i).toInt().toChar() | ||
| } | ||
| return chars | ||
| } | ||
|
|
||
| /** | ||
| * Encode a [ByteArray] to Base16 [String] standard | ||
| */ | ||
| val ByteArray.base16Encoded: String | ||
| get() = Base16.encode(this) | ||
|
|
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| /** | ||
| * Decode a [ByteArray] Base16 standard encoded to [String] | ||
| */ | ||
| val ByteArray.base16Decoded: String | ||
| get() = asCharArray().concatToString().base16Encoded | ||
|
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| /** | ||
| * Encode a [ByteArray] to Base16 [String] Upper | ||
| */ | ||
| val ByteArray.base16UpperEncoded: String | ||
| get() = Base16.encode(this, Encoding.Upper) | ||
|
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| /** | ||
| * Decode a [ByteArray] Base16 Upper encoded to [String] | ||
| */ | ||
| val ByteArray.base16UpperDecoded: String | ||
| get() = asCharArray().concatToString().base16UpperDecoded |
22 changes: 22 additions & 0 deletions
22
didpeer/src/commonMain/kotlin/io/iohk/atala/prism/didcomm/didpeer/base16/Encoding.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,22 @@ | ||
| package io.iohk.atala.prism.didcomm.didpeer.base16 | ||
|
|
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| /** | ||
| * Base16 encoding scheme | ||
| */ | ||
| sealed interface Encoding { | ||
| val alphabet: String | ||
|
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| /** | ||
| * Base16 Standard | ||
| */ | ||
| data object Standard : Encoding { | ||
| override val alphabet: String = "0123456789abcdef" | ||
| } | ||
|
|
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| /** | ||
| * Base16 Upper | ||
| */ | ||
| data object Upper : Encoding { | ||
| override val alphabet: String = "0123456789ABCDEF" | ||
| } | ||
| } |
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