doc/man7/EVP_SIGNATURE-RSA.pod

   1 =pod
   2
   3 =head1 NAME
   4
   5 EVP_SIGNATURE-RSA
   6 - The EVP_PKEY RSA signature implementation
   7
   8 =head1 DESCRIPTION
   9
  10 Support for computing RSA signatures.
  11 See L<EVP_PKEY-RSA(7)> for information related to RSA keys.
  12
  13 =head2 Signature Parameters
  14
  15 The following signature parameters can be set using EVP_PKEY_CTX_set_params().
  16 This may be called after EVP_PKEY_sign_init() or EVP_PKEY_verify_init(),
  17 and before calling EVP_PKEY_sign() or EVP_PKEY_verify().
  18
  19 =over 4
  20
  21 =item "digest" (B<OSSL_SIGNATURE_PARAM_DIGEST>) <UTF8 string>
  22
  23 =item "properties" (B<OSSL_SIGNATURE_PARAM_PROPERTIES>) <UTF8 string>
  24
  25 These common parameters are described in L<provider-signature(7)>.
  26
  27 =item "pad-mode" (B<OSSL_SIGNATURE_PARAM_PAD_MODE>) <UTF8 string>
  28
  29 The type of padding to be used. Its value can be one of the following:
  30
  31 =over 4
  32
  33 =item "none" (B<OSSL_PKEY_RSA_PAD_MODE_NONE>)
  34
  35 =item "pkcs1" (B<OSSL_PKEY_RSA_PAD_MODE_PKCSV15>)
  36
  37 =item "sslv23" (B<OSSL_PKEY_RSA_PAD_MODE_SSLV23>)
  38
  39 =item "x931" (B<OSSL_PKEY_RSA_PAD_MODE_X931>)
  40
  41 =item "pss" (B<OSSL_PKEY_RSA_PAD_MODE_PSS>)
  42
  43 =back
  44
  45 =item "mgf1-digest" (B<OSSL_SIGNATURE_PARAM_MGF1_DIGEST>) <UTF8 string>
  46
  47 The digest algorithm name to use for the maskGenAlgorithm used by "pss" mode.
  48
  49 =item "mgf1-properties" (B<OSSL_SIGNATURE_PARAM_MGF1_PROPERTIES>) <UTF8 string>
  50
  51 Sets the name of the property query associated with the "mgf1-digest" algorithm.
  52 NULL is used if this optional value is not set.
  53
  54 =item "pss-saltlen" (B<OSSL_SIGNATURE_PARAM_PSS_SALTLEN>) <UTF8 string>
  55
  56 Set or get the "pss" mode minimum salt length. The value can either be a string
  57 value representing a number or one of the following:
  58
  59 =over 4
  60
  61 =item "digest" (B<OSSL_PKEY_RSA_PSS_SALT_LEN_DIGEST>)
  62
  63 Use the same length as the digest size.
  64
  65 =item "max" (B<OSSL_PKEY_RSA_PSS_SALT_LEN_MAX>)
  66
  67 Use the maximum salt length.
  68
  69 =item "auto" (B<OSSL_PKEY_RSA_PSS_SALT_LEN_AUTO>)
  70
  71 Auto detect the salt length.
  72
  73 =back
  74
  75 =back
  76
  77 The following signature parameters can be retrieved using
  78 EVP_PKEY_CTX_get_params().
  79
  80 =over 4
  81
  82 =item "algorithm-id" (B<OSSL_SIGNATURE_PARAM_ALGORITHM_ID>) <octet string>
  83
  84 This common parameter is described in L<provider-signature(7)>.
  85
  86 =item "digest" (B<OSSL_SIGNATURE_PARAM_DIGEST>) <UTF8 string>
  87
  88 =item "pad-mode" (B<OSSL_SIGNATURE_PARAM_PAD_MODE>) <UTF8 string>
  89
  90 =item "mgf1-digest" (B<OSSL_SIGNATURE_PARAM_MGF1_DIGEST>) <UTF8 string>
  91
  92 These parameters are as described above.
  93
  94 =back
  95
  96 =head1 SEE ALSO
  97
  98 L<EVP_PKEY_CTX_set_params(3)>,
  99 L<EVP_PKEY_sign(3)>,
 100 L<EVP_PKEY_verify(3)>,
 101 L<provider-signature(7)>,
 102
 103 =head1 COPYRIGHT
 104
 105 Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.
 106
 107 Licensed under the Apache License 2.0 (the "License").  You may not use
 108 this file except in compliance with the License.  You can obtain a copy
 109 in the file LICENSE in the source distribution or at
 110 L<https://www.openssl.org/source/license.html>.
 111
 112 =cut