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libsodium/test/default/codecs.exp
Ilya Maykov 6bece9c8c4 Relax most __attribute__ ((nonnull)) to allow 0-length inputs to be NULL.
Justifications:
- crypto_(auth|hash|generichash|onetimeauth|shorthash)*:
  it's legal to hash or HMAC a 0-length message
- crypto_box*: it's legal to encrypt a 0-length message
- crypto_sign*: it's legal to sign a 0-length message
- utils:
  comparing two 0-length byte arrays is legal
  memzero on a 0-length byte array is a no-op
  converting an empty hex string to binary results in an empty binary string
  converting an empty binary string to hex results in an empty hex string
  converting an empty b64 string to binary results in an empty binary string
  converting an empty binary string to b64 results in an empty b64 string
  sodium_add / sodium_sub on zero-length arrays is a no-op

For the functions declared in utils.h, I moved the logic into private functions that
have the __attribute__ ((nonnull)) check, but they are only called when the
corresponding length argument is non-0. I didn't do this for the hash/box/sign
functions since it would have been a lot more work and quite a large refactor.

Only memset() may have issues with a zero length.

Fix tests, use guard page instead of NULL because of Wasm
2019-04-26 15:36:58 +02:00

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bin2hex(..., guard_page, 0):
bin2hex(..., "", 0):
4:cafe6942
dt1: 11
4:cafe6942
dt2: 2
dt3: 11
dt4: 11
dt5: 11
dt6: 11
+/DxMDEyMzQ1Njc4OUFCQ0RFRmFi
+/DxMDEyMzQ1Njc4OUFCQ0RFRmFiYw
-_DxMDEyMzQ1Njc4OUFCQ0RFRmFi
-_DxMDEyMzQ1Njc4OUFCQ0RFRmFiYw
YQ==
YWI=
YWJj
YQ
YWI
YWJj
[]
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