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1 | .\" $OpenBSD: DSA_new.3,v 1.14 2023/12/29 19:12:47 tb Exp $ | ||
2 | .\" OpenSSL b97fdb57 Nov 11 09:33:09 2016 +0100 | ||
3 | .\" | ||
4 | .\" This file was written by Ulf Moeller <ulf@openssl.org>. | ||
5 | .\" Copyright (c) 2000, 2002 The OpenSSL Project. All rights reserved. | ||
6 | .\" | ||
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51 | .Dd $Mdocdate: December 29 2023 $ | ||
52 | .Dt DSA_NEW 3 | ||
53 | .Os | ||
54 | .Sh NAME | ||
55 | .Nm DSA_new , | ||
56 | .Nm DSA_up_ref , | ||
57 | .Nm DSA_free | ||
58 | .Nd allocate and free DSA objects | ||
59 | .Sh SYNOPSIS | ||
60 | .In openssl/dsa.h | ||
61 | .Ft DSA* | ||
62 | .Fn DSA_new void | ||
63 | .Ft int | ||
64 | .Fo DSA_up_ref | ||
65 | .Fa "DSA *dsa" | ||
66 | .Fc | ||
67 | .Ft void | ||
68 | .Fo DSA_free | ||
69 | .Fa "DSA *dsa" | ||
70 | .Fc | ||
71 | .Sh DESCRIPTION | ||
72 | The DSA functions implement the Digital Signature Algorithm. | ||
73 | .Pp | ||
74 | .Fn DSA_new | ||
75 | allocates and initializes a | ||
76 | .Vt DSA | ||
77 | structure, setting the reference count to 1. | ||
78 | It is equivalent to calling | ||
79 | .Xr DSA_new_method 3 | ||
80 | with a | ||
81 | .Dv NULL | ||
82 | argument. | ||
83 | .Pp | ||
84 | .Fn DSA_up_ref | ||
85 | increments the reference count by 1. | ||
86 | .Pp | ||
87 | .Fn DSA_free | ||
88 | decrements the reference count by 1. | ||
89 | If it reaches 0, it frees the | ||
90 | .Vt DSA | ||
91 | structure and its components. | ||
92 | The values are erased before the memory is returned to the system. | ||
93 | If | ||
94 | .Fa dsa | ||
95 | is a | ||
96 | .Dv NULL | ||
97 | pointer, no action occurs. | ||
98 | .Sh RETURN VALUES | ||
99 | If the allocation fails, | ||
100 | .Fn DSA_new | ||
101 | returns | ||
102 | .Dv NULL | ||
103 | and sets an error code that can be obtained by | ||
104 | .Xr ERR_get_error 3 . | ||
105 | Otherwise it returns a pointer to the newly allocated structure. | ||
106 | .Pp | ||
107 | .Fn DSA_up_ref | ||
108 | returns 1 for success or 0 for failure. | ||
109 | .Sh SEE ALSO | ||
110 | .Xr BN_new 3 , | ||
111 | .Xr crypto 3 , | ||
112 | .Xr d2i_DSAPublicKey 3 , | ||
113 | .Xr DH_new 3 , | ||
114 | .Xr DSA_do_sign 3 , | ||
115 | .Xr DSA_dup_DH 3 , | ||
116 | .Xr DSA_generate_key 3 , | ||
117 | .Xr DSA_generate_parameters_ex 3 , | ||
118 | .Xr DSA_get0_pqg 3 , | ||
119 | .Xr DSA_get_ex_new_index 3 , | ||
120 | .Xr DSA_meth_new 3 , | ||
121 | .Xr DSA_print 3 , | ||
122 | .Xr DSA_security_bits 3 , | ||
123 | .Xr DSA_set_method 3 , | ||
124 | .Xr DSA_SIG_new 3 , | ||
125 | .Xr DSA_sign 3 , | ||
126 | .Xr DSA_size 3 , | ||
127 | .Xr EVP_PKEY_set1_DSA 3 , | ||
128 | .Xr RSA_new 3 | ||
129 | .Sh STANDARDS | ||
130 | US Federal Information Processing Standard FIPS 186 (Digital Signature | ||
131 | Standard, DSS), ANSI X9.30 | ||
132 | .Sh HISTORY | ||
133 | .Fn DSA_new | ||
134 | and | ||
135 | .Fn DSA_free | ||
136 | first appeared in SSLeay 0.6.0 and have been available since | ||
137 | .Ox 2.4 . | ||
138 | .Pp | ||
139 | .Fn DSA_up_ref | ||
140 | first appeared in OpenSSL 0.9.7 and has been available since | ||
141 | .Ox 3.2 . | ||