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author | marha <marha@users.sourceforge.net> | 2009-06-28 22:07:26 +0000 |
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committer | marha <marha@users.sourceforge.net> | 2009-06-28 22:07:26 +0000 |
commit | 3562e78743202e43aec8727005182a2558117eca (patch) | |
tree | 8f9113a77d12470c5c851a2a8e4cb02e89df7d43 /openssl/doc/crypto/DSA_do_sign.pod | |
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Diffstat (limited to 'openssl/doc/crypto/DSA_do_sign.pod')
-rw-r--r-- | openssl/doc/crypto/DSA_do_sign.pod | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/openssl/doc/crypto/DSA_do_sign.pod b/openssl/doc/crypto/DSA_do_sign.pod new file mode 100644 index 000000000..5dfc733b2 --- /dev/null +++ b/openssl/doc/crypto/DSA_do_sign.pod @@ -0,0 +1,47 @@ +=pod + +=head1 NAME + +DSA_do_sign, DSA_do_verify - raw DSA signature operations + +=head1 SYNOPSIS + + #include <openssl/dsa.h> + + DSA_SIG *DSA_do_sign(const unsigned char *dgst, int dlen, DSA *dsa); + + int DSA_do_verify(const unsigned char *dgst, int dgst_len, + DSA_SIG *sig, DSA *dsa); + +=head1 DESCRIPTION + +DSA_do_sign() computes a digital signature on the B<len> byte message +digest B<dgst> using the private key B<dsa> and returns it in a +newly allocated B<DSA_SIG> structure. + +L<DSA_sign_setup(3)|DSA_sign_setup(3)> may be used to precompute part +of the signing operation in case signature generation is +time-critical. + +DSA_do_verify() verifies that the signature B<sig> matches a given +message digest B<dgst> of size B<len>. B<dsa> is the signer's public +key. + +=head1 RETURN VALUES + +DSA_do_sign() returns the signature, NULL on error. DSA_do_verify() +returns 1 for a valid signature, 0 for an incorrect signature and -1 +on error. The error codes can be obtained by +L<ERR_get_error(3)|ERR_get_error(3)>. + +=head1 SEE ALSO + +L<dsa(3)|dsa(3)>, L<ERR_get_error(3)|ERR_get_error(3)>, L<rand(3)|rand(3)>, +L<DSA_SIG_new(3)|DSA_SIG_new(3)>, +L<DSA_sign(3)|DSA_sign(3)> + +=head1 HISTORY + +DSA_do_sign() and DSA_do_verify() were added in OpenSSL 0.9.3. + +=cut |