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Correct documentation for PKCS5_PBKDF2_HMAC

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In OpenSSL 3.x, the documentation for PKCS5_PBKDF2_HMAC incorrectly states
that an iter value less than 1 is treated as a single iteration. Upon further
investigation in providers/implementations/kdfs/pbkdf2.c, it appears that
invalid iter values will result in failure and raise the
PROV_R_INVALID_ITERATION_COUNT error. This commit corrects the documentation
to accurately reflect the behavior in OpenSSL 3.x.

Closes openssl#22168

Signed-off-by: Sumitra Sharma <sumitraartsy@gmail.com>

Reviewed-by: Paul Dale <pauli@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/22252)
This commit is contained in:
Sumitra Sharma 2023-10-03 09:28:44 +05:30 committed by Tomas Mraz
parent 1296c2ec78
commit 82496b8663
1 changed files with 2 additions and 1 deletions
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doc/man3/PKCS5_PBKDF2_HMAC.pod
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@ -33,7 +33,8 @@ be NULL terminated.
B<iter> is the iteration count and its value should be greater than or
equal to 1. RFC 2898 suggests an iteration count of at least 1000. Any
B<iter> less than 1 is treated as a single iteration.
B<iter> value less than 1 is invalid; such values will result in failure
and raise the PROV_R_INVALID_ITERATION_COUNT error.
B<digest> is the message digest function used in the derivation.
PKCS5_PBKDF2_HMAC_SHA1() calls PKCS5_PBKDF2_HMAC() with EVP_sha1().