f987a4dd89
The manual pages require for some API functions that the 'random number
generator must be seeded' before calling the function. Initially, this
was meant literally, i.e. the OpenSSL CSPRNG had to be seeded manually
before calling these functions.
Since version 1.1.1, the CSPRNG is seeded automatically on first use,
so it's not the responsibility of the programmer anymore. Still, he
needs to be aware that the seeding might fail.
Reviewed-by: Paul Dale <paul.dale@oracle.com>
Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org>
(Merged from https://github.com/openssl/openssl/pull/9257)
(cherry picked from commit 262c00882a)
67 lines
2 KiB
Text
67 lines
2 KiB
Text
=pod
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=head1 NAME
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RSA_sign_ASN1_OCTET_STRING, RSA_verify_ASN1_OCTET_STRING - RSA signatures
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=head1 SYNOPSIS
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#include <openssl/rsa.h>
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int RSA_sign_ASN1_OCTET_STRING(int dummy, unsigned char *m,
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unsigned int m_len, unsigned char *sigret,
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unsigned int *siglen, RSA *rsa);
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int RSA_verify_ASN1_OCTET_STRING(int dummy, unsigned char *m,
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unsigned int m_len, unsigned char *sigbuf,
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unsigned int siglen, RSA *rsa);
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=head1 DESCRIPTION
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RSA_sign_ASN1_OCTET_STRING() signs the octet string B<m> of size
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B<m_len> using the private key B<rsa> represented in DER using PKCS #1
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padding. It stores the signature in B<sigret> and the signature size
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in B<siglen>. B<sigret> must point to B<RSA_size(rsa)> bytes of
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memory.
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B<dummy> is ignored.
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The random number generator must be seeded when calling
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RSA_sign_ASN1_OCTET_STRING().
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If the automatic seeding or reseeding of the OpenSSL CSPRNG fails due to
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external circumstances (see L<RAND(7)>), the operation will fail.
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RSA_verify_ASN1_OCTET_STRING() verifies that the signature B<sigbuf>
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of size B<siglen> is the DER representation of a given octet string
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B<m> of size B<m_len>. B<dummy> is ignored. B<rsa> is the signer's
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public key.
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=head1 RETURN VALUES
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RSA_sign_ASN1_OCTET_STRING() returns 1 on success, 0 otherwise.
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RSA_verify_ASN1_OCTET_STRING() returns 1 on successful verification, 0
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otherwise.
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The error codes can be obtained by L<ERR_get_error(3)>.
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=head1 BUGS
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These functions serve no recognizable purpose.
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=head1 SEE ALSO
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L<ERR_get_error(3)>,
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L<RAND_bytes(3)>, L<RSA_sign(3)>,
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L<RSA_verify(3)>,
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L<RAND(7)>
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=head1 COPYRIGHT
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Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the OpenSSL license (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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