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135 .IX Title "RSA_SIGN_ASN1_OCTET_STRING 3"
136 .TH RSA_SIGN_ASN1_OCTET_STRING 3 "2021-08-24" "1.1.1l" "OpenSSL"
137 .\" For nroff, turn off justification. Always turn off hyphenation; it makes
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142 RSA_sign_ASN1_OCTET_STRING, RSA_verify_ASN1_OCTET_STRING \- RSA signatures
144 .IX Header "SYNOPSIS"
146 \& #include <openssl/rsa.h>
148 \& int RSA_sign_ASN1_OCTET_STRING(int dummy, unsigned char *m,
149 \& unsigned int m_len, unsigned char *sigret,
150 \& unsigned int *siglen, RSA *rsa);
152 \& int RSA_verify_ASN1_OCTET_STRING(int dummy, unsigned char *m,
153 \& unsigned int m_len, unsigned char *sigbuf,
154 \& unsigned int siglen, RSA *rsa);
157 .IX Header "DESCRIPTION"
158 \&\fBRSA_sign_ASN1_OCTET_STRING()\fR signs the octet string \fBm\fR of size
159 \&\fBm_len\fR using the private key \fBrsa\fR represented in \s-1DER\s0 using \s-1PKCS\s0 #1
160 padding. It stores the signature in \fBsigret\fR and the signature size
161 in \fBsiglen\fR. \fBsigret\fR must point to \fBRSA_size(rsa)\fR bytes of
164 \&\fBdummy\fR is ignored.
166 The random number generator must be seeded when calling
167 \&\fBRSA_sign_ASN1_OCTET_STRING()\fR.
168 If the automatic seeding or reseeding of the OpenSSL \s-1CSPRNG\s0 fails due to
169 external circumstances (see \s-1\fBRAND\s0\fR\|(7)), the operation will fail.
171 \&\fBRSA_verify_ASN1_OCTET_STRING()\fR verifies that the signature \fBsigbuf\fR
172 of size \fBsiglen\fR is the \s-1DER\s0 representation of a given octet string
173 \&\fBm\fR of size \fBm_len\fR. \fBdummy\fR is ignored. \fBrsa\fR is the signer's
176 .IX Header "RETURN VALUES"
177 \&\fBRSA_sign_ASN1_OCTET_STRING()\fR returns 1 on success, 0 otherwise.
178 \&\fBRSA_verify_ASN1_OCTET_STRING()\fR returns 1 on successful verification, 0
181 The error codes can be obtained by \fBERR_get_error\fR\|(3).
184 These functions serve no recognizable purpose.
186 .IX Header "SEE ALSO"
187 \&\fBERR_get_error\fR\|(3),
188 \&\fBRAND_bytes\fR\|(3), \fBRSA_sign\fR\|(3),
189 \&\fBRSA_verify\fR\|(3),
190 \&\s-1\fBRAND\s0\fR\|(7)
192 .IX Header "COPYRIGHT"
193 Copyright 2000\-2019 The OpenSSL Project Authors. All Rights Reserved.
195 Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use
196 this file except in compliance with the License. You can obtain a copy
197 in the file \s-1LICENSE\s0 in the source distribution or at
198 <https://www.openssl.org/source/license.html>.