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.\" ========================================================================
.\"
.IX Title "RSA_sign_ASN1_OCTET_STRING 3"
.TH RSA_sign_ASN1_OCTET_STRING 3 "2019-12-20" "1.0.2u" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
RSA_sign_ASN1_OCTET_STRING, RSA_verify_ASN1_OCTET_STRING \- RSA signatures
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/rsa.h>
\&
\& int RSA_sign_ASN1_OCTET_STRING(int dummy, unsigned char *m,
\&    unsigned int m_len, unsigned char *sigret, unsigned int *siglen,
\&    RSA *rsa);
\&
\& int RSA_verify_ASN1_OCTET_STRING(int dummy, unsigned char *m,
\&    unsigned int m_len, unsigned char *sigbuf, unsigned int siglen,
\&    RSA *rsa);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fBRSA_sign_ASN1_OCTET_STRING()\fR signs the octet string \fBm\fR of size
\&\fBm_len\fR using the private key \fBrsa\fR represented in \s-1DER\s0 using \s-1PKCS\s0 #1
padding. It stores the signature in \fBsigret\fR and the signature size
in \fBsiglen\fR. \fBsigret\fR must point to \fBRSA_size(rsa)\fR bytes of
memory.
.PP
\&\fBdummy\fR is ignored.
.PP
The random number generator must be seeded prior to calling \fBRSA_sign_ASN1_OCTET_STRING()\fR.
.PP
\&\fBRSA_verify_ASN1_OCTET_STRING()\fR verifies that the signature \fBsigbuf\fR
of size \fBsiglen\fR is the \s-1DER\s0 representation of a given octet string
\&\fBm\fR of size \fBm_len\fR. \fBdummy\fR is ignored. \fBrsa\fR is the signer's
public key.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fBRSA_sign_ASN1_OCTET_STRING()\fR returns 1 on success, 0 otherwise.
\&\fBRSA_verify_ASN1_OCTET_STRING()\fR returns 1 on successful verification, 0
otherwise.
.PP
The error codes can be obtained by \fBERR_get_error\fR\|(3).
.SH "BUGS"
.IX Header "BUGS"
These functions serve no recognizable purpose.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBERR_get_error\fR\|(3), \fBobjects\fR\|(3),
\&\fBrand\fR\|(3), \fBrsa\fR\|(3), \fBRSA_sign\fR\|(3),
\&\fBRSA_verify\fR\|(3)
.SH "HISTORY"
.IX Header "HISTORY"
\&\fBRSA_sign_ASN1_OCTET_STRING()\fR and \fBRSA_verify_ASN1_OCTET_STRING()\fR were
added in SSLeay 0.8.
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