Baguette/sodium.cr
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Add exceptions and error checking.

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Didactic Drunk 2019-05-25 17:40:28 -07:00
parent 8346d47bc1
commit e82d4416b4
1 changed files with 21 additions and 3 deletions
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24
src/cox.cr
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@ -1,3 +1,15 @@
require "random/secure"
module Cox
class Error < ::Exception
end
class VerificationFailed < Error
end
class DecryptionFailed < Error
end
end
require "./cox/*"
module Cox
@ -5,7 +17,9 @@ module Cox
data_buffer = data.to_slice
data_size = data_buffer.bytesize
output_buffer = Bytes.new(data_buffer.bytesize + LibSodium::MAC_BYTES)
LibSodium.crypto_box_easy(output_buffer.to_unsafe, data_buffer, data_size, nonce.pointer, recipient_public_key.pointer, sender_secret_key.pointer)
if LibSodium.crypto_box_easy(output_buffer.to_unsafe, data_buffer, data_size, nonce.pointer, recipient_public_key.pointer, sender_secret_key.pointer) != 0
raise Error.new("crypto_box_easy")
end
output_buffer
end
@ -18,7 +32,9 @@ module Cox
data_buffer = data.to_slice
data_size = data_buffer.bytesize
output_buffer = Bytes.new(data_buffer.bytesize - LibSodium::MAC_BYTES)
LibSodium.crypto_box_open_easy(output_buffer.to_unsafe, data_buffer.to_unsafe, data_size, nonce.pointer, sender_public_key.pointer, recipient_secret_key.pointer)
if LibSodium.crypto_box_open_easy(output_buffer.to_unsafe, data_buffer.to_unsafe, data_size, nonce.pointer, sender_public_key.pointer, recipient_secret_key.pointer) != 0
raise DecryptionFailed.new("crypto_box_open_easy")
end
output_buffer
end
@ -27,7 +43,9 @@ module Cox
message_buffer_size = message_buffer.bytesize
signature_output_buffer = Bytes.new(LibSodium::SIGNATURE_BYTES)
LibSodium.crypto_sign_detached(signature_output_buffer.to_unsafe, 0, message_buffer.to_unsafe, message_buffer_size, secret_key.pointer)
if LibSodium.crypto_sign_detached(signature_output_buffer.to_unsafe, 0, message_buffer.to_unsafe, message_buffer_size, secret_key.pointer) != 0
raise Error.new("crypto_sign_detached")
end
signature_output_buffer
end