1DSA_DO_SIGN(3ossl)                  OpenSSL                 DSA_DO_SIGN(3ossl)
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NAME

6       DSA_do_sign, DSA_do_verify - raw DSA signature operations
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SYNOPSIS

9        #include <openssl/dsa.h>
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11       The following functions have been deprecated since OpenSSL 3.0, and can
12       be hidden entirely by defining OPENSSL_API_COMPAT with a suitable
13       version value, see openssl_user_macros(7):
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15        DSA_SIG *DSA_do_sign(const unsigned char *dgst, int dlen, DSA *dsa);
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17        int DSA_do_verify(const unsigned char *dgst, int dgst_len,
18                          DSA_SIG *sig, DSA *dsa);
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DESCRIPTION

21       All of the functions described on this page are deprecated.
22       Applications should instead use EVP_PKEY_sign_init(3),
23       EVP_PKEY_sign(3), EVP_PKEY_verify_init(3) and EVP_PKEY_verify(3).
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25       DSA_do_sign() computes a digital signature on the len byte message
26       digest dgst using the private key dsa and returns it in a newly
27       allocated DSA_SIG structure.
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29       DSA_sign_setup(3) may be used to precompute part of the signing
30       operation in case signature generation is time-critical.
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32       DSA_do_verify() verifies that the signature sig matches a given message
33       digest dgst of size len.  dsa is the signer's public key.
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RETURN VALUES

36       DSA_do_sign() returns the signature, NULL on error.  DSA_do_verify()
37       returns 1 for a valid signature, 0 for an incorrect signature and -1 on
38       error. The error codes can be obtained by ERR_get_error(3).
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SEE ALSO

41       DSA_new(3), ERR_get_error(3), RAND_bytes(3), DSA_SIG_new(3),
42       DSA_sign(3)
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HISTORY

45       All of these functions were deprecated in OpenSSL 3.0.
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48       Copyright 2000-2021 The OpenSSL Project Authors. All Rights Reserved.
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50       Licensed under the Apache License 2.0 (the "License").  You may not use
51       this file except in compliance with the License.  You can obtain a copy
52       in the file LICENSE in the source distribution or at
53       <https://www.openssl.org/source/license.html>.
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573.1.1                             2023-08-31                DSA_DO_SIGN(3ossl)
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