Clarify return values for EVP_DigestVerifyFinal.

[openssl.git] / doc / crypto / EVP_DigestVerifyInit.pod

diff --git a/doc/crypto/EVP_DigestVerifyInit.pod b/doc/crypto/EVP_DigestVerifyInit.pod
index e0217e40cba8d28dc9541d9b796779789d62fed6..338fc74616cd7247c5fa3734a84047dcef4e11eb 100644 (file)
--- a/doc/crypto/EVP_DigestVerifyInit.pod
+++ b/doc/crypto/EVP_DigestVerifyInit.pod
@@ -34,15 +34,15 @@ B<sig> of length B<siglen>.
 =head1 RETURN VALUES
 
 EVP_DigestVerifyInit() and EVP_DigestVerifyUpdate() return 1 for success and 0
 =head1 RETURN VALUES
 
 EVP_DigestVerifyInit() and EVP_DigestVerifyUpdate() return 1 for success and 0

-or a negative value for failure. In particular a return value of -2 indicates
-the operation is not supported by the public key algorithm.
+for failure.

 
 

-Unlike other functions the return value 0 from EVP_DigestVerifyFinal() only
-indicates that the signature did not verify successfully (that is tbs did
-not match the original data or the signature was of invalid form) it is not an
-indication of a more serious error.
+EVP_DigestVerifyFinal() returns 1 for success; any other value indicates
+failure.  A return value of zero indicates that the signature did not verify
+successfully (that is, tbs did not match the original data or the signature had
+an invalid form), while other values indicate a more serious error (and
+sometimes also indicate an invalid signature form).

 
 

-The error codes can be obtained from L<ERR_get_error(3)|ERR_get_error(3)>.
+The error codes can be obtained from L<ERR_get_error(3)>.

 
 =head1 NOTES
 
 
 =head1 NOTES
 


@@ -68,11 +68,11 @@ will occur.
 
 =head1 SEE ALSO
 
 
 =head1 SEE ALSO
 

-L<EVP_DigestSignInit(3)|EVP_DigestSignInit(3)>,
-L<EVP_DigestInit(3)|EVP_DigestInit(3)>, L<err(3)|err(3)>,
-L<evp(3)|evp(3)>, L<hmac(3)|hmac(3)>, L<md2(3)|md2(3)>,
-L<md5(3)|md5(3)>, L<mdc2(3)|mdc2(3)>, L<ripemd(3)|ripemd(3)>,
-L<sha(3)|sha(3)>, L<dgst(1)|dgst(1)>
+L<EVP_DigestSignInit(3)>,
+L<EVP_DigestInit(3)>, L<err(3)>,
+L<evp(3)>, L<hmac(3)>, L<md2(3)>,
+L<md5(3)>, L<mdc2(3)>, L<ripemd(3)>,
+L<sha(3)>, L<dgst(1)>

 
 =head1 HISTORY
 
 
 =head1 HISTORY