From 3fa39ed723fb431fa5517f5511847e06fa2f825f Mon Sep 17 00:00:00 2001 From: "Dr. Stephen Henson" Date: Fri, 24 Jul 2009 13:01:40 +0000 Subject: [PATCH] Document removal of digest+signature algorithm link. --- doc/crypto/EVP_DigestInit.pod | 17 ++++++++++------- 1 file changed, 10 insertions(+), 7 deletions(-) diff --git a/doc/crypto/EVP_DigestInit.pod b/doc/crypto/EVP_DigestInit.pod index 130cd7f60a..d83363bb80 100644 --- a/doc/crypto/EVP_DigestInit.pod +++ b/doc/crypto/EVP_DigestInit.pod @@ -132,7 +132,9 @@ return B structures for the MD2, MD5, SHA, SHA1, MDC2 and RIPEMD160 dige algorithms respectively. The associated signature algorithm is RSA in each case. EVP_dss() and EVP_dss1() return B structures for SHA and SHA1 digest -algorithms but using DSS (DSA) for the signature algorithm. +algorithms but using DSS (DSA) for the signature algorithm. Note: there is +no need to use these pseudo-digests in OpenSSL 1.0.0 and later, they are +however retained for compatibility. EVP_md_null() is a "null" message digest that does nothing: i.e. the hash it returns is of zero length. @@ -228,12 +230,6 @@ digest name passed on the command line. printf("\n"); } -=head1 BUGS - -The link between digests and signing algorithms results in a situation where -EVP_sha1() must be used with RSA and EVP_dss1() must be used with DSS -even though they are identical digests. - =head1 SEE ALSO L, L, L, @@ -253,4 +249,11 @@ EVP_md_null(), EVP_md2(), EVP_md5(), EVP_sha(), EVP_sha1(), EVP_dss(), EVP_dss1(), EVP_mdc2() and EVP_ripemd160() were changed to return truely const EVP_MD * in OpenSSL 0.9.7. +The link between digests and signing algorithms was fixed in OpenSSL 1.0 and +later, so now EVP_sha1() can be used with RSA and DSA, there is no need to +use EVP_dss1() any more. + +OpenSSL 1.0 and later does not include the MD2 digest algorithm in the +default configuration due to its security weaknesses. + =cut -- GitLab