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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" CMS_get0_SignerInfos, CMS_SignerInfo_get0_signer_id, CMS_SignerInfo_get0_signature, CMS_SignerInfo_cert_cmp, CMS_set1_signer_cert \- CMS signedData signer functions. .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #include <openssl/cms.h> \& \& STACK_OF(CMS_SignerInfo) *CMS_get0_SignerInfos(CMS_ContentInfo *cms); \& \& int CMS_SignerInfo_get0_signer_id(CMS_SignerInfo *si, ASN1_OCTET_STRING **keyid, X509_NAME **issuer, ASN1_INTEGER **sno); \& ASN1_OCTET_STRING *CMS_SignerInfo_get0_signature(CMS_SignerInfo *si); \& int CMS_SignerInfo_cert_cmp(CMS_SignerInfo *si, X509 *cert); \& void CMS_SignerInfo_set1_signer_cert(CMS_SignerInfo *si, X509 *signer); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" The function \fBCMS_get0_SignerInfos()\fR returns all the CMS_SignerInfo structures associated with a \s-1CMS\s0 signedData structure. .PP \&\fBCMS_SignerInfo_get0_signer_id()\fR retrieves the certificate signer identifier associated with a specific CMS_SignerInfo structure \fBsi\fR. Either the keyidentifier will be set in \fBkeyid\fR or \fBboth\fR issuer name and serial number in \fBissuer\fR and \fBsno\fR. .PP \&\fBCMS_SignerInfo_get0_signature()\fR retrieves the signature associated with \&\fBsi\fR in a pointer to an \s-1ASN1_OCTET_STRING\s0 structure. This pointer returned corresponds to the internal signature value if \fBsi\fR so it may be read or modified. .PP \&\fBCMS_SignerInfo_cert_cmp()\fR compares the certificate \fBcert\fR against the signer identifier \fBsi\fR. It returns zero if the comparison is successful and non zero if not. .PP \&\fBCMS_SignerInfo_set1_signer_cert()\fR sets the signers certificate of \fBsi\fR to \&\fBsigner\fR. .\" Oracle has added the ARC stability level to this manual page .SH ATTRIBUTES See .BR attributes (7) for descriptions of the following attributes: .sp .TS box; cbp-1 | cbp-1 l | l . ATTRIBUTE TYPE ATTRIBUTE VALUE = Availability library/security/openssl = Stability Pass-through uncommitted .TE .PP .SH "NOTES" .IX Header "NOTES" The main purpose of these functions is to enable an application to lookup signers certificates using any appropriate technique when the simpler method of \fBCMS_verify()\fR is not appropriate. .PP In typical usage and application will retrieve all CMS_SignerInfo structures using \fBCMS_get0_SignerInfo()\fR and retrieve the identifier information using \&\s-1CMS.\s0 It will then obtain the signer certificate by some unspecified means (or return and error if it cannot be found) and set it using \&\fBCMS_SignerInfo_set1_signer_cert()\fR. .PP Once all signer certificates have been set \fBCMS_verify()\fR can be used. .PP Although \fBCMS_get0_SignerInfos()\fR can return \s-1NULL\s0 if an error occurs \fBor\fR if there are no signers this is not a problem in practice because the only error which can occur is if the \fBcms\fR structure is not of type signedData due to application error. .\" Oracle has added source availability information to this manual page Source code for open source software components in Oracle Solaris can be found at https://www.oracle.com/downloads/opensource/solaris-source-code-downloads.html. This software was built from source available at https://github.com/oracle/solaris-userland. The original community source was downloaded from https://www.openssl.org/source/openssl-1.0.2zi.tar.gz. Further information about this software can be found on the open source community website at https://www.openssl.org/. .SH "RETURN VALUES" .IX Header "RETURN VALUES" \&\fBCMS_get0_SignerInfos()\fR returns all CMS_SignerInfo structures, or \s-1NULL\s0 there are no signers or an error occurs. .PP \&\fBCMS_SignerInfo_get0_signer_id()\fR returns 1 for success and 0 for failure. .PP \&\fBCMS_SignerInfo_cert_cmp()\fR returns 0 for a successful comparison and non zero otherwise. .PP \&\fBCMS_SignerInfo_set1_signer_cert()\fR does not return a value. .PP Any error can be obtained from \fBERR_get_error\fR\|(3) .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fBERR_get_error\fR\|(3), \fBCMS_verify\fR\|(3) .SH "HISTORY" .IX Header "HISTORY" These functions were first was added to OpenSSL 0.9.8