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@@ -10,7 +10,7 @@ Support for computing the B<PBKDF2> password-based KDF through the B<EVP_KDF>
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API.
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The EVP_KDF_PBKDF2 algorithm implements the PBKDF2 password-based key
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derivation function, as described in RFC 2898; it derives a key from a password
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derivation function, as described in SP800-132; it derives a key from a password
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using a salt and iteration count.
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=head2 Numeric identity
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@@ -30,13 +30,38 @@ The supported controls are:
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=item B<EVP_KDF_CTRL_SET_ITER>
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This control has a default value of 2048.
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=item B<EVP_KDF_CTRL_SET_MD>
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These controls work as described in L<EVP_KDF_CTX(3)/CONTROLS>.
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B<iter> is the iteration count and its value should be greater than or equal to
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1. RFC 2898 suggests an iteration count of at least 1000. The default value is
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2048. Any B<iter> less than 1 is treated as a single iteration.
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=item B<EVP_KDF_CTRL_SET_PBKDF2_PKCS5_MODE>
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This control expects one argument: C<int mode>
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This control can be used to enable or disable SP800-132 compliance checks.
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Setting the mode to 0 enables the compliance checks.
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The checks performed are:
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=over 4
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=item - the iteration count is at least 1000.
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=item - the salt length is at least 128 bits.
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=item - the derived key length is at least 112 bits.
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=back
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The default provider uses a default mode of 1 for backwards compatibility,
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and the fips provider uses a default mode of 0.
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EVP_KDF_ctrl_str() type string: "pkcs5"
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The value string is expected to be a decimal number 0 or 1.
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=back
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@@ -55,7 +80,7 @@ byte sequence.
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=head1 CONFORMING TO
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RFC 2898
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SP800-132
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=head1 SEE ALSO
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@@ -66,9 +91,13 @@ L<EVP_KDF_ctrl(3)>,
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L<EVP_KDF_derive(3)>,
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L<EVP_KDF_CTX(3)/CONTROLS>
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=head1 HISTORY
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This functionality was added to OpenSSL 3.0.0.
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=head1 COPYRIGHT
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Copyright 2018 The OpenSSL Project Authors. All Rights Reserved.
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Copyright 2018-2019 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the Apache License 2.0 (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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