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kCCModeOptionCTR_BE needed when using CTR block mode #50

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kCCModeOptionCTR_BE needed when using CTR block mode #50

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5 changes: 3 additions & 2 deletions SwCrypt/SwCrypt.swift
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Original file line number Diff line number Diff line change
@@ -1,4 +1,5 @@
import Foundation
import CommonCrypto

open class SwKeyStore {

Expand Down Expand Up @@ -724,7 +725,7 @@ open class CC {

public static func crypt(_ opMode: OpMode, blockMode: BlockMode,
algorithm: Algorithm, padding: Padding,
data: Data, key: Data, iv: Data) throws -> Data {
data: Data, key: Data, iv: Data, options: Int = kCCModeOptionCTR_BE) throws -> Data {
if blockMode.needIV {
guard iv.count == algorithm.blockSize else { throw CCError(.paramError) }
}
Expand All @@ -736,7 +737,7 @@ open class CC {
algorithm.rawValue, padding.rawValue,
ivBytes, keyBytes, key.count,
nil, 0, 0,
CCModeOptions(), &cryptor)
CCModeOptions(options), &cryptor)
})

guard status == noErr else { throw CCError(status) }
Expand Down