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Clarified that the signature's buffer size, s, is not used as an

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IN parameter.

Under the old docs, the only thing stated was "at most
EVP_PKEY_size(pkey) bytes will be written". It was kind of misleading
since it appears EVP_PKEY_size(pkey) WILL be written regardless of the
signature's buffer size.

(cherry picked from commit 6e6ba36d98)
This commit is contained in:
Jeffrey Walton 2014-06-29 23:34:21 +01:00 committed by Matt Caswell
parent 105a3db56e
commit 02e8d46119
1 changed files with 5 additions and 3 deletions
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8
doc/crypto/EVP_SignInit.pod
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@ -30,9 +30,11 @@ signature context B<ctx>. This function can be called several times on the
same B<ctx> to include additional data.
EVP_SignFinal() signs the data in B<ctx> using the private key B<pkey> and
places the signature in B<sig>. The number of bytes of data written (i.e. the
length of the signature) will be written to the integer at B<s>, at most
EVP_PKEY_size(pkey) bytes will be written.
places the signature in B<sig>. B<sig> must be at least EVP_PKEY_size(pkey)
bytes in size. B<s> is an OUT paramter, and not used as an IN parameter.
The number of bytes of data written (i.e. the length of the signature)
will be written to the integer at B<s>, at most EVP_PKEY_size(pkey) bytes
will be written.
EVP_SignInit() initializes a signing context B<ctx> to use the default
implementation of digest B<type>.