DSA_verify man page on DigitalUNIX

Man page or keyword search:  
man Server   12896 pages
apropos Keyword Search (all sections)
Output format
DigitalUNIX logo
[printable version]

DSA_sign(3)							   DSA_sign(3)

NAME
       DSA_sign, DSA_sign_setup, DSA_verify - DSA signatures

SYNOPSIS
       #include <openssl/dsa.h>

       int  DSA_sign(
	       int  type,  const  unsigned  char *dgst, int len, unsigned char
       *sigret, unsigned int *siglen, DSA *dsa ); int	DSA_sign_setup(
	       DSA *dsa, BN_CTX *ctx, BIGNUM **kinvp,  BIGNUM  **rp  );	 int
       DSA_verify(
	       int  type,  const  unsigned  char *dgst, int len, unsigned char
       *sigbuf, int siglen, DSA *dsa );

DESCRIPTION
       The DSA_sign() function computes a digital signature on	the  len  byte
       message	digest	(dgst)	using the private key dsa and places its ASN.1
       DER encoding at sigret. The  length  of	the  signature	is  placed  in
       *siglen. The sigret must point to DSA_size(dsa) bytes of memory.

       The  DSA_sign_setup()  function	may  be used to precompute part of the
       signing operation in case signature generation  is  time-critical.   It
       expects dsa to contain DSA parameters. It places the precomputed values
       in newly allocated BIGNUMs at *kinvp and *rp,  after  freeing  the  old
       ones  unless  *kinvp  and  *rp  are NULL. These values may be passed to
       DSA_sign() in dsa->kinv and dsa->r. The ctx is a	 pre-allocated	BN_CTX
       or NULL.

       The  DSA_verify()  function  verifies that the signature sigbuf of size
       siglen matches a given message digest dgst of size len. The dsa is  the
       signer's public key.

       The type parameter is ignored.

       The PRNG must be seeded before the DSA_sign() or DSA_sign_setup() func‐
       tion is called.

       These functions conform to US Federal Information  Processing  Standard
       FIPS 186 (Digital Signature Standard, DSS), ANSI X9.30.

RETURN VALUES
       The DSA_sign() and DSA_sign_setup() functions return 1 on success, 0 on
       error. The DSA_verify() function returns 1 for a valid signature, 0 for
       an  incorrect  signature,  and  -1  on  error.  The  error codes can be
       obtained from ERR_get_error().

HISTORY
       The DSA_sign() and DSA_verify() functions are available in all versions
       of SSLeay. The DSA_sign_setup() function was added in SSLeay 0.8.

SEE ALSO
       Functions: dsa(3), err(3), rand(3), DSA_do_sign(3)

								   DSA_sign(3)
[top]

List of man pages available for DigitalUNIX

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
....................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net