Update files for OpenSSL-1.0.0f import.
[dragonfly.git] / secure / lib / libcrypto / man / CMS_get0_SignerInfos.3
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124.\" ========================================================================
125.\"
126.IX Title "CMS_get0_SignerInfos 3"
e3261593 127.TH CMS_get0_SignerInfos 3 "2012-01-04" "1.0.0f" "OpenSSL"
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128.\" For nroff, turn off justification. Always turn off hyphenation; it makes
129.\" way too many mistakes in technical documents.
130.if n .ad l
131.nh
132.SH "NAME"
133.Vb 1
134\& CMS_get0_SignerInfos, CMS_SignerInfo_get0_signer_id, CMS_SignerInfo_cert_cmp, CMS_set1_signer_certs \- CMS signedData signer functions.
135.Ve
136.SH "SYNOPSIS"
137.IX Header "SYNOPSIS"
138.Vb 1
139\& #include <openssl/cms.h>
140\&
141\& STACK_OF(CMS_SignerInfo) *CMS_get0_SignerInfos(CMS_ContentInfo *cms);
142\&
143\& int CMS_SignerInfo_get0_signer_id(CMS_SignerInfo *si, ASN1_OCTET_STRING **keyid, X509_NAME **issuer, ASN1_INTEGER **sno);
144\& int CMS_SignerInfo_cert_cmp(CMS_SignerInfo *si, X509 *cert);
145\& void CMS_SignerInfo_set1_signer_cert(CMS_SignerInfo *si, X509 *signer);
146.Ve
147.SH "DESCRIPTION"
148.IX Header "DESCRIPTION"
149The function \fICMS_get0_SignerInfos()\fR returns all the CMS_SignerInfo structures
150associated with a \s-1CMS\s0 signedData structure.
151.PP
152\&\fICMS_SignerInfo_get0_signer_id()\fR retrieves the certificate signer identifier
153associated with a specific CMS_SignerInfo structure \fBsi\fR. Either the
154keyidentifier will be set in \fBkeyid\fR or \fBboth\fR issuer name and serial number
155in \fBissuer\fR and \fBsno\fR.
156.PP
157\&\fICMS_SignerInfo_cert_cmp()\fR compares the certificate \fBcert\fR against the signer
158identifier \fBsi\fR. It returns zero if the comparison is successful and non zero
159if not.
160.PP
161\&\fICMS_SignerInfo_set1_signer_cert()\fR sets the signers certificate of \fBsi\fR to
162\&\fBsigner\fR.
163.SH "NOTES"
164.IX Header "NOTES"
165The main purpose of these functions is to enable an application to lookup
166signers certificates using any appropriate technique when the simpler method
167of \fICMS_verify()\fR is not appropriate.
168.PP
169In typical usage and application will retrieve all CMS_SignerInfo structures
170using \fICMS_get0_SignerInfo()\fR and retrieve the identifier information using
171\&\s-1CMS\s0. It will then obtain the signer certificate by some unspecified means
172(or return and error if it cannot be found) and set it using
173\&\fICMS_SignerInfo_set1_signer_cert()\fR.
174.PP
175Once all signer certificates have been set \fICMS_verify()\fR can be used.
176.PP
177Although \fICMS_get0_SignerInfos()\fR can return \s-1NULL\s0 is an error occur \fBor\fR if
178there are no signers this is not a problem in practice because the only
179error which can occur is if the \fBcms\fR structure is not of type signedData
180due to application error.
181.SH "RETURN VALUES"
182.IX Header "RETURN VALUES"
183\&\fICMS_get0_SignerInfos()\fR returns all CMS_SignerInfo structures, or \s-1NULL\s0 there
184are no signers or an error occurs.
185.PP
186\&\fICMS_SignerInfo_get0_signer_id()\fR returns 1 for success and 0 for failure.
187.PP
188\&\fICMS_SignerInfo_cert_cmp()\fR returns 0 for a successful comparison and non
189zero otherwise.
190.PP
191\&\fICMS_SignerInfo_set1_signer_cert()\fR does not return a value.
192.PP
193Any error can be obtained from \fIERR_get_error\fR\|(3)
194.SH "SEE ALSO"
195.IX Header "SEE ALSO"
196\&\fIERR_get_error\fR\|(3), \fICMS_verify\fR\|(3)
197.SH "HISTORY"
198.IX Header "HISTORY"
199These functions were first was added to OpenSSL 0.9.8