Import OpenSSL 1.1.0f
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@@ -8,10 +8,10 @@ EVP_BytesToKey - password based encryption routine
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#include <openssl/evp.h>
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int EVP_BytesToKey(const EVP_CIPHER *type,const EVP_MD *md,
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const unsigned char *salt,
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const unsigned char *data, int datal, int count,
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unsigned char *key,unsigned char *iv);
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int EVP_BytesToKey(const EVP_CIPHER *type, const EVP_MD *md,
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const unsigned char *salt,
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const unsigned char *data, int datal, int count,
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unsigned char *key, unsigned char *iv);
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=head1 DESCRIPTION
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@@ -29,7 +29,7 @@ A typical application of this function is to derive keying material for an
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encryption algorithm from a password in the B<data> parameter.
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Increasing the B<count> parameter slows down the algorithm which makes it
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harder for an attacker to peform a brute force attack using a large number
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harder for an attacker to perform a brute force attack using a large number
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of candidate passwords.
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If the total key and IV length is less than the digest length and
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@@ -44,9 +44,9 @@ defined in PKCS#5v2.1 and provided by PKCS5_PBKDF2_HMAC.
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The key and IV is derived by concatenating D_1, D_2, etc until
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enough data is available for the key and IV. D_i is defined as:
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D_i = HASH^count(D_(i-1) || data || salt)
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D_i = HASH^count(D_(i-1) || data || salt)
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where || denotes concatentaion, D_0 is empty, HASH is the digest
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where || denotes concatenation, D_0 is empty, HASH is the digest
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algorithm in use, HASH^1(data) is simply HASH(data), HASH^2(data)
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is HASH(HASH(data)) and so on.
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@@ -62,9 +62,17 @@ or 0 on error.
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=head1 SEE ALSO
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L<evp(3)|evp(3)>, L<rand(3)|rand(3)>,
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L<EVP_EncryptInit(3)|EVP_EncryptInit(3)>
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L<evp(3)>, L<rand(3)>,
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L<PKCS5_PBKDF2_HMAC(3)>,
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L<EVP_EncryptInit(3)>
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=head1 HISTORY
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=head1 COPYRIGHT
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Copyright 2001-2016 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the OpenSSL license (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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in the file LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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