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authorbeck <>2000-03-19 11:13:58 +0000
committerbeck <>2000-03-19 11:13:58 +0000
commit796d609550df3a33fc11468741c5d2f6d3df4c11 (patch)
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parent5be3114c1fd7e0dfea1e38d3abb4cbba75244419 (diff)
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OpenSSL 0.9.5 merge
*warning* this bumps shared lib minors for libssl and libcrypto from 2.1 to 2.2 if you are using the ssl26 packages for ssh and other things to work you will need to get new ones (see ~beck/libsslsnap/<arch>) on cvs or ~beck/src-patent.tar.gz on cvs
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1=pod
2
3=head1 NAME
4
5dsa - Digital Signature Algorithm
6
7=head1 SYNOPSIS
8
9 #include <openssl/dsa.h>
10
11 DSA * DSA_new(void);
12 void DSA_free(DSA *dsa);
13
14 int DSA_size(DSA *dsa);
15
16 DSA * DSA_generate_parameters(int bits, unsigned char *seed,
17 int seed_len, int *counter_ret, unsigned long *h_ret,
18 void (*callback)(int, int, void *), void *cb_arg);
19
20 DH * DSA_dup_DH(DSA *r);
21
22 int DSA_generate_key(DSA *dsa);
23
24 int DSA_sign(int dummy, const unsigned char *dgst, int len,
25 unsigned char *sigret, unsigned int *siglen, DSA *dsa);
26 int DSA_sign_setup(DSA *dsa, BN_CTX *ctx, BIGNUM **kinvp,
27 BIGNUM **rp);
28 int DSA_verify(int dummy, const unsigned char *dgst, int len,
29 unsigned char *sigbuf, int siglen, DSA *dsa);
30
31 void DSA_set_default_method(DSA_METHOD *meth);
32 DSA_METHOD *DSA_get_default_method(void);
33 DSA_METHOD *DSA_set_method(DSA *dsa, DSA_METHOD *meth);
34 DSA *DSA_new_method(DSA_METHOD *meth);
35 DSA_METHOD *DSA_OpenSSL(void);
36
37 int DSA_get_ex_new_index(long argl, char *argp, int (*new_func)(),
38 int (*dup_func)(), void (*free_func)());
39 int DSA_set_ex_data(DSA *d, int idx, char *arg);
40 char *DSA_get_ex_data(DSA *d, int idx);
41
42 DSA_SIG *DSA_SIG_new(void);
43 void DSA_SIG_free(DSA_SIG *a);
44 int i2d_DSA_SIG(DSA_SIG *a, unsigned char **pp);
45 DSA_SIG *d2i_DSA_SIG(DSA_SIG **v, unsigned char **pp, long length);
46
47 DSA_SIG *DSA_do_sign(const unsigned char *dgst, int dlen, DSA *dsa);
48 int DSA_do_verify(const unsigned char *dgst, int dgst_len,
49 DSA_SIG *sig, DSA *dsa);
50
51 DSA * d2i_DSAPublicKey(DSA **a, unsigned char **pp, long length);
52 DSA * d2i_DSAPrivateKey(DSA **a, unsigned char **pp, long length);
53 DSA * d2i_DSAparams(DSA **a, unsigned char **pp, long length);
54 int i2d_DSAPublicKey(DSA *a, unsigned char **pp);
55 int i2d_DSAPrivateKey(DSA *a, unsigned char **pp);
56 int i2d_DSAparams(DSA *a,unsigned char **pp);
57
58 int DSAparams_print(BIO *bp, DSA *x);
59 int DSAparams_print_fp(FILE *fp, DSA *x);
60 int DSA_print(BIO *bp, DSA *x, int off);
61 int DSA_print_fp(FILE *bp, DSA *x, int off);
62
63=head1 DESCRIPTION
64
65These functions implement the Digital Signature Algorithm (DSA). The
66generation of shared DSA parameters is described in
67L<DSA_generate_parameters(3)|DSA_generate_parameters(3)>;
68L<DSA_generate_key(3)|DSA_generate_key(3)> describes how to
69generate a signature key. Signature generation and verification are
70described in L<DSA_sign(3)|DSA_sign(3)>.
71
72The B<DSA> structure consists of several BIGNUM components.
73
74 struct
75 {
76 BIGNUM *p; // prime number (public)
77 BIGNUM *q; // 160-bit subprime, q | p-1 (public)
78 BIGNUM *g; // generator of subgroup (public)
79 BIGNUM *priv_key; // private key x
80 BIGNUM *pub_key; // public key y = g^x
81 // ...
82 }
83 DSA;
84
85In public keys, B<priv_key> is NULL.
86
87=head1 CONFORMING TO
88
89US Federal Information Processing Standard FIPS 186 (Digital Signature
90Standard, DSS), ANSI X9.30
91
92=head1 SEE ALSO
93
94L<bn(3)|bn(3)>, L<dh(3)|dh(3)>, L<err(3)|err(3)>, L<rand(3)|rand(3)>,
95L<rsa(3)|rsa(3)>, L<sha(3)|sha(3)>, L<DSA_new(3)|DSA_new(3)>,
96L<DSA_size(3)|DSA_size(3)>,
97L<DSA_generate_parameters(3)|DSA_generate_parameters(3)>,
98L<DSA_dup_DH(3)|DSA_dup_DH(3)>,
99L<DSA_generate_key(3)|DSA_generate_key(3)>,
100L<DSA_sign(3)|DSA_sign(3)>, L<DSA_set_method(3)|DSA_set_method(3)>,
101L<DSA_get_ex_new_index(3)|DSA_get_ex_new_index(3)>,
102L<RSA_print(3)|RSA_print(3)>
103
104=cut