A local copy of OpenSSL from GitHub
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  1. =pod
  2. =head1 NAME
  3. OSSL_PROVIDER-legacy - OpenSSL legacy provider
  4. =head1 DESCRIPTION
  5. The OpenSSL legacy provider supplies OpenSSL implementations of algorithms
  6. that have been deemed legacy. Such algorithms have commonly fallen out of
  7. use, have been deemed insecure by the cryptography community, or something
  8. similar.
  9. We can consider this the retirement home of cryptographic algorithms.
  10. =head2 Properties
  11. The implementations in this provider specifically has this property
  12. defined:
  13. =over 4
  14. =item "provider=legacy"
  15. =back
  16. It may be used in a property query string with fetching functions such as
  17. L<EVP_MD_fetch(3)> or L<EVP_CIPHER_fetch(3)>, as well as with other
  18. functions that take a property query string, such as
  19. L<EVP_PKEY_CTX_new_from_name(3)>.
  20. It isn't mandatory to query for any of these properties, except to
  21. make sure to get implementations of this provider and none other.
  22. =head1 OPERATIONS AND ALGORITHMS
  23. The OpenSSL legacy provider supports these operations and algorithms:
  24. =head2 Hashing Algorithms / Message Digests
  25. =over 4
  26. =item MD2, see L<EVP_MD-MD2(7)>
  27. =item MD4, see L<EVP_MD-MD4(7)>
  28. =item MDC2, see L<EVP_MD-MDC2(7)>
  29. =item WHIRLPOOL, see L<EVP_MD-WHIRLPOOL(7)>
  30. =item RIPEMD160, see L<EVP_MD-RIPEMD160(7)>
  31. =back
  32. =head2 Symmetric Ciphers
  33. Not all of these symmetric cipher algorithms are enabled by default.
  34. =over 4
  35. =item Blowfish
  36. =item CAST
  37. =item DES
  38. The algorithm names are: DES_ECB, DES_CBC, DES_OFB, DES_CFB, DES_CFB1, DES_CFB8
  39. and DESX_CBC.
  40. =item RC2
  41. =item RC4
  42. =item RC5
  43. Disabled by default. Use I<enable-rc5> config option to enable.
  44. =item SEED
  45. =back
  46. =begin comment
  47. When algorithms for other operations start appearing, the
  48. following =head2 titles are appropriate to use:
  49. - Message Authentication Code (MAC)
  50. - Key Derivation Function (KDF)
  51. - Key Exchange
  52. - Signature
  53. - Asymmetric Cipher
  54. - Asymmetric Key Management
  55. =end comment
  56. =head1 SEE ALSO
  57. L<OSSL_PARAM(3)>,
  58. L<openssl-core.h(7)>,
  59. L<openssl-core_dispatch.h(7)>,
  60. L<provider(7)>
  61. =head1 COPYRIGHT
  62. Copyright 2020-2021 The OpenSSL Project Authors. All Rights Reserved.
  63. Licensed under the Apache License 2.0 (the "License"). You may not use
  64. this file except in compliance with the License. You can obtain a copy
  65. in the file LICENSE in the source distribution or at
  66. L<https://www.openssl.org/source/license.html>.
  67. =cut