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| author | Hans Nilsson <[email protected]> | 2019-03-21 11:59:25 +0100 |
|---|---|---|
| committer | Hans Nilsson <[email protected]> | 2019-03-22 10:23:51 +0100 |
| commit | 9d4d218eef62a64e1596f0208a7af674785efb38 (patch) | |
| tree | e19af5938ada05d6604e5337e9d57efb1a598950 | |
| parent | 97a97c8021c2740182b43ee95067898a01622000 (diff) | |
| download | otp-9d4d218eef62a64e1596f0208a7af674785efb38.tar.gz otp-9d4d218eef62a64e1596f0208a7af674785efb38.tar.bz2 otp-9d4d218eef62a64e1596f0208a7af674785efb38.zip | |
crypto: Note about key lengths for cipher_info/1
| -rw-r--r-- | lib/crypto/doc/src/crypto.xml | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/crypto/doc/src/crypto.xml b/lib/crypto/doc/src/crypto.xml index 251263714d..64872d7414 100644 --- a/lib/crypto/doc/src/crypto.xml +++ b/lib/crypto/doc/src/crypto.xml @@ -917,6 +917,15 @@ <p>Provides a map with information about block_size, key_length, iv_length and possibly other properties of the cipher algorithm in question. </p> + <note> + <p>The ciphers <c>aes_cbc</c>, <c>aes_cfb8</c>, <c>aes_cfb128</c>, <c>aes_ctr</c>, + <c>aes_ecb</c>, <c>aes_gcm</c> and <c>aes_ccm</c> + has no keylength in the <c>Type</c> as opposed to for example <c>aes_128_ctr</c>. They adapt to the length of + the key provided in the encrypt and decrypt function. Therefor it is impossible to return a valid keylength + in the map.</p> + <p>Always use a <c>Type</c> with an explicit key length, + </p> + </note> <p>For a list of supported cipher algorithms, see <seealso marker="#supports-0">supports/0</seealso>. </p> </desc> |