| 1 | =pod
|
|---|
| 2 |
|
|---|
| 3 | =head1 NAME
|
|---|
| 4 |
|
|---|
| 5 | PKCS5_PBE_keyivgen, PKCS5_PBE_keyivgen_ex, PKCS5_pbe2_set, PKCS5_pbe2_set_iv,
|
|---|
| 6 | PKCS5_pbe2_set_iv_ex, PKCS5_pbe_set, PKCS5_pbe_set_ex, PKCS5_pbe2_set_scrypt,
|
|---|
| 7 | PKCS5_pbe_set0_algor, PKCS5_pbe_set0_algor_ex,
|
|---|
| 8 | PKCS5_v2_PBE_keyivgen, PKCS5_v2_PBE_keyivgen_ex,
|
|---|
| 9 | PKCS5_v2_scrypt_keyivgen, PKCS5_v2_scrypt_keyivgen_ex,
|
|---|
| 10 | PKCS5_pbkdf2_set, PKCS5_pbkdf2_set_ex, EVP_PBE_scrypt, EVP_PBE_scrypt_ex
|
|---|
| 11 | - PKCS#5 Password based encryption routines
|
|---|
| 12 |
|
|---|
| 13 | =head1 SYNOPSIS
|
|---|
| 14 |
|
|---|
| 15 | #include <openssl/evp.h>
|
|---|
| 16 |
|
|---|
| 17 | int PKCS5_PBE_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass, int passlen,
|
|---|
| 18 | ASN1_TYPE *param, const EVP_CIPHER *cipher,
|
|---|
| 19 | const EVP_MD *md, int en_de);
|
|---|
| 20 | int PKCS5_PBE_keyivgen_ex(EVP_CIPHER_CTX *cctx, const char *pass, int passlen,
|
|---|
| 21 | ASN1_TYPE *param, const EVP_CIPHER *cipher,
|
|---|
| 22 | const EVP_MD *md, int en_de, OSSL_LIB_CTX *libctx,
|
|---|
| 23 | const char *propq);
|
|---|
| 24 | int PKCS5_v2_PBE_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass, int passlen,
|
|---|
| 25 | ASN1_TYPE *param, const EVP_CIPHER *cipher,
|
|---|
| 26 | const EVP_MD *md, int en_de);
|
|---|
| 27 | int PKCS5_v2_PBE_keyivgen_ex(EVP_CIPHER_CTX *ctx, const char *pass, int passlen,
|
|---|
| 28 | ASN1_TYPE *param, const EVP_CIPHER *cipher,
|
|---|
| 29 | const EVP_MD *md, int en_de,
|
|---|
| 30 | OSSL_LIB_CTX *libctx, const char *propq);
|
|---|
| 31 | int EVP_PBE_scrypt(const char *pass, size_t passlen,
|
|---|
| 32 | const unsigned char *salt, size_t saltlen,
|
|---|
| 33 | uint64_t N, uint64_t r, uint64_t p, uint64_t maxmem,
|
|---|
| 34 | unsigned char *key, size_t keylen);
|
|---|
| 35 | int EVP_PBE_scrypt_ex(const char *pass, size_t passlen,
|
|---|
| 36 | const unsigned char *salt, size_t saltlen,
|
|---|
| 37 | uint64_t N, uint64_t r, uint64_t p, uint64_t maxmem,
|
|---|
| 38 | unsigned char *key, size_t keylen,
|
|---|
| 39 | OSSL_LIB_CTX *ctx, const char *propq);
|
|---|
| 40 | int PKCS5_v2_scrypt_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass,
|
|---|
| 41 | int passlen, ASN1_TYPE *param,
|
|---|
| 42 | const EVP_CIPHER *c, const EVP_MD *md, int en_de);
|
|---|
| 43 | int PKCS5_v2_scrypt_keyivgen_ex(EVP_CIPHER_CTX *ctx, const char *pass,
|
|---|
| 44 | int passlen, ASN1_TYPE *param,
|
|---|
| 45 | const EVP_CIPHER *c, const EVP_MD *md, int en_de,
|
|---|
| 46 | OSSL_LIB_CTX *libctx, const char *propq);
|
|---|
| 47 |
|
|---|
| 48 | #include <openssl/x509.h>
|
|---|
| 49 |
|
|---|
| 50 | int PKCS5_pbe_set0_algor(X509_ALGOR *algor, int alg, int iter,
|
|---|
| 51 | const unsigned char *salt, int saltlen);
|
|---|
| 52 | int PKCS5_pbe_set0_algor_ex(X509_ALGOR *algor, int alg, int iter,
|
|---|
| 53 | const unsigned char *salt, int saltlen,
|
|---|
| 54 | OSSL_LIB_CTX *libctx);
|
|---|
| 55 |
|
|---|
| 56 | X509_ALGOR *PKCS5_pbe_set(int alg, int iter,
|
|---|
| 57 | const unsigned char *salt, int saltlen);
|
|---|
| 58 | X509_ALGOR *PKCS5_pbe_set_ex(int alg, int iter,
|
|---|
| 59 | const unsigned char *salt, int saltlen,
|
|---|
| 60 | OSSL_LIB_CTX *libctx);
|
|---|
| 61 |
|
|---|
| 62 | X509_ALGOR *PKCS5_pbe2_set(const EVP_CIPHER *cipher, int iter,
|
|---|
| 63 | unsigned char *salt, int saltlen);
|
|---|
| 64 | X509_ALGOR *PKCS5_pbe2_set_iv(const EVP_CIPHER *cipher, int iter,
|
|---|
| 65 | unsigned char *salt, int saltlen,
|
|---|
| 66 | unsigned char *aiv, int prf_nid);
|
|---|
| 67 | X509_ALGOR *PKCS5_pbe2_set_iv_ex(const EVP_CIPHER *cipher, int iter,
|
|---|
| 68 | unsigned char *salt, int saltlen,
|
|---|
| 69 | unsigned char *aiv, int prf_nid,
|
|---|
| 70 | OSSL_LIB_CTX *libctx);
|
|---|
| 71 | X509_ALGOR *PKCS5_pbe2_set_scrypt(const EVP_CIPHER *cipher,
|
|---|
| 72 | const unsigned char *salt, int saltlen,
|
|---|
| 73 | unsigned char *aiv, uint64_t N, uint64_t r,
|
|---|
| 74 | uint64_t p);
|
|---|
| 75 |
|
|---|
| 76 | X509_ALGOR *PKCS5_pbkdf2_set(int iter, unsigned char *salt, int saltlen,
|
|---|
| 77 | int prf_nid, int keylen);
|
|---|
| 78 | X509_ALGOR *PKCS5_pbkdf2_set_ex(int iter, unsigned char *salt, int saltlen,
|
|---|
| 79 | int prf_nid, int keylen,
|
|---|
| 80 | OSSL_LIB_CTX *libctx);
|
|---|
| 81 |
|
|---|
| 82 | =head1 DESCRIPTION
|
|---|
| 83 |
|
|---|
| 84 | =head2 Key Derivation
|
|---|
| 85 |
|
|---|
| 86 | PKCS5_PBE_keyivgen() and PKCS5_PBE_keyivgen_ex() take a password I<pass> of
|
|---|
| 87 | length I<passlen>, parameters I<param> and a message digest function I<md_type>
|
|---|
| 88 | and performs a key derivation according to PKCS#5 PBES1. The resulting key is
|
|---|
| 89 | then used to initialise the cipher context I<ctx> with a cipher I<cipher> for
|
|---|
| 90 | encryption (I<en_de>=1) or decryption (I<en_de>=0).
|
|---|
| 91 |
|
|---|
| 92 | I<pass> is an optional parameter and can be NULL. If I<passlen> is -1, then the
|
|---|
| 93 | function will calculate the length of I<pass> using strlen().
|
|---|
| 94 |
|
|---|
| 95 | PKCS5_v2_PBE_keyivgen() and PKCS5_v2_PBE_keyivgen_ex() are similar to the above
|
|---|
| 96 | but instead use PKCS#5 PBES2 as the encryption algorithm using the supplied
|
|---|
| 97 | parameters.
|
|---|
| 98 |
|
|---|
| 99 | PKCS5_v2_scrypt_keyivgen() and PKCS5_v2_scrypt_keyivgen_ex() use SCRYPT as the
|
|---|
| 100 | key derivation part of the encryption algorithm.
|
|---|
| 101 |
|
|---|
| 102 | I<salt> is the salt used in the derivation of length I<saltlen>. If the
|
|---|
| 103 | I<salt> is NULL, then I<saltlen> must be 0. The function will not
|
|---|
| 104 | attempt to calculate the length of the I<salt> because it is not assumed to
|
|---|
| 105 | be NULL terminated.
|
|---|
| 106 |
|
|---|
| 107 | I<iter> is the iteration count and its value should be greater than or
|
|---|
| 108 | equal to 1. RFC 2898 suggests an iteration count of at least 1000. Any
|
|---|
| 109 | I<iter> less than 1 is treated as a single iteration.
|
|---|
| 110 |
|
|---|
| 111 | I<digest> is the message digest function used in the derivation.
|
|---|
| 112 |
|
|---|
| 113 | Functions ending in _ex() take optional parameters I<libctx> and I<propq> which
|
|---|
| 114 | are used to select appropriate algorithm implementations.
|
|---|
| 115 |
|
|---|
| 116 | =head2 Algorithm Identifier Creation
|
|---|
| 117 |
|
|---|
| 118 | PKCS5_pbe_set(), PKCS5_pbe_set_ex(), PKCS5_pbe2_set(), PKCS5_pbe2_set_iv(),
|
|---|
| 119 | PKCS5_pbe2_set_iv_ex() and PKCS5_pbe2_set_scrypt() generate an B<X509_ALGOR>
|
|---|
| 120 | object which represents an AlgorithmIdentifier containing the algorithm OID and
|
|---|
| 121 | associated parameters for the PBE algorithm.
|
|---|
| 122 |
|
|---|
| 123 | PKCS5_pbkdf2_set() and PKCS5_pbkdf2_set_ex() generate an B<X509_ALGOR>
|
|---|
| 124 | object which represents an AlgorithmIdentifier containing the algorithm OID and
|
|---|
| 125 | associated parameters for the PBKDF2 algorithm.
|
|---|
| 126 |
|
|---|
| 127 | PKCS5_pbe_set0_algor() and PKCS5_pbe_set0_algor_ex() set the PBE algorithm OID and
|
|---|
| 128 | parameters into the supplied B<X509_ALGOR>.
|
|---|
| 129 |
|
|---|
| 130 | =head1 NOTES
|
|---|
| 131 |
|
|---|
| 132 | The *_keyivgen() functions are typically used in PKCS#12 to encrypt objects.
|
|---|
| 133 |
|
|---|
| 134 | These functions make no assumption regarding the given password.
|
|---|
| 135 | It will simply be treated as a byte sequence.
|
|---|
| 136 |
|
|---|
| 137 | =head1 RETURN VALUES
|
|---|
| 138 |
|
|---|
| 139 | PKCS5_PBE_keyivgen(), PKCS5_v2_PBE_keyivgen(),
|
|---|
| 140 | PKCS5_v2_PBE_keyivgen_ex(), PKCS5_v2_scrypt_keyivgen(),
|
|---|
| 141 | PKCS5_v2_scrypt_keyivgen_ex(), PKCS5_pbe_set0_algor() and
|
|---|
| 142 | PKCS5_pbe_set0_algor_ex() return 1 for success and 0 if an error occurs.
|
|---|
| 143 |
|
|---|
| 144 | PKCS5_pbe_set(), PKCS5_pbe_set_ex(), PKCS5_pbe2_set(), PKCS5_pbe2_set_iv(),
|
|---|
| 145 | PKCS5_pbe2_set_iv_ex(), PKCS5_pbe2_set_scrypt(),
|
|---|
| 146 | PKCS5_pbkdf2_set() and PKCS5_pbkdf2_set_ex() return an B<X509_ALGOR> object or
|
|---|
| 147 | NULL if an error occurs.
|
|---|
| 148 |
|
|---|
| 149 | =head1 CONFORMING TO
|
|---|
| 150 |
|
|---|
| 151 | IETF RFC 8018 (L<https://tools.ietf.org/html/rfc8018>)
|
|---|
| 152 |
|
|---|
| 153 | =head1 SEE ALSO
|
|---|
| 154 |
|
|---|
| 155 | L<EVP_PBE_CipherInit_ex(3)>,
|
|---|
| 156 | L<PKCS12_pbe_crypt_ex(3)>,
|
|---|
| 157 | L<passphrase-encoding(7)>
|
|---|
| 158 |
|
|---|
| 159 | =head1 HISTORY
|
|---|
| 160 |
|
|---|
| 161 | PKCS5_v2_PBE_keyivgen_ex(), EVP_PBE_scrypt_ex(), PKCS5_v2_scrypt_keyivgen_ex(),
|
|---|
| 162 | PKCS5_pbe_set0_algor_ex(), PKCS5_pbe_set_ex(), PKCS5_pbe2_set_iv_ex() and
|
|---|
| 163 | PKCS5_pbkdf2_set_ex() were added in OpenSSL 3.0.
|
|---|
| 164 |
|
|---|
| 165 | From OpenSSL 3.0 the PBKDF1 algorithm used in PKCS5_PBE_keyivgen() and
|
|---|
| 166 | PKCS5_PBE_keyivgen_ex() has been moved to the legacy provider as an EVP_KDF.
|
|---|
| 167 |
|
|---|
| 168 | =head1 COPYRIGHT
|
|---|
| 169 |
|
|---|
| 170 | Copyright 2021 The OpenSSL Project Authors. All Rights Reserved.
|
|---|
| 171 |
|
|---|
| 172 | Licensed under the Apache License 2.0 (the "License"). You may not use
|
|---|
| 173 | this file except in compliance with the License. You can obtain a copy
|
|---|
| 174 | in the file LICENSE in the source distribution or at
|
|---|
| 175 | L<https://www.openssl.org/source/license.html>.
|
|---|
| 176 |
|
|---|
| 177 | =cut
|
|---|
