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SCT_new.3
.\" Automatically generated by Pod::Man 4.11 (Pod::Simple 3.35) .\" .\" Standard preamble: .\" ======================================================================== .de Sp \" Vertical space (when we can't use .PP) .if t .sp .5v .if n .sp .. .de Vb \" Begin verbatim text .ft CW .nf .ne \\$1 .. .de Ve \" End verbatim text .ft R .fi .. .\" Set up some character translations and predefined strings. \*(-- will .\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left .\" double quote, and \*(R" will give a right double quote. \*(C+ will .\" give a nicer C++. Capital omega is used to do unbreakable dashes and .\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff, .\" nothing in troff, for use with C<>. .tr \(*W- .ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p' .ie n \{\ . ds -- \(*W- . ds PI pi . if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch . if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch . ds L" "" . ds R" "" . ds C` "" . ds C' "" 'br\} .el\{\ . ds -- \|\(em\| . ds PI \(*p . ds L" `` . ds R" '' . ds C` . ds C' 'br\} .\" .\" Escape single quotes in literal strings from groff's Unicode transform. .ie \n(.g .ds Aq \(aq .el .ds Aq ' .\" .\" If the F register is >0, we'll generate index entries on stderr for .\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index .\" entries marked with X<> in POD. Of course, you'll have to process the .\" output yourself in some meaningful fashion. .\" .\" Avoid warning from groff about undefined register 'F'. .de IX .. .nr rF 0 .if \n(.g .if rF .nr rF 1 .if (\n(rF:(\n(.g==0)) \{\ . if \nF \{\ . de IX . tm Index:\\$1\t\\n%\t"\\$2" .. . if !\nF==2 \{\ . nr % 0 . nr F 2 . \} . \} .\} .rr rF .\" .\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2). .\" Fear. Run. Save yourself. No user-serviceable parts. . \" fudge factors for nroff and troff .if n \{\ . ds #H 0 . ds #V .8m . ds #F .3m . ds #[ \f1 . ds #] \fP .\} .if t \{\ . ds #H ((1u-(\\\\n(.fu%2u))*.13m) . ds #V .6m . ds #F 0 . ds #[ \& . ds #] \& .\} . \" simple accents for nroff and troff .if n \{\ . ds ' \& . ds ` \& . ds ^ \& . ds , \& . ds ~ ~ . ds / .\} .if t \{\ . ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u" . ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u' . ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u' . ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u' . ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u' . ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u' .\} . \" troff and (daisy-wheel) nroff accents .ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V' .ds 8 \h'\*(#H'\(*b\h'-\*(#H' .ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#] .ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H' .ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u' .ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#] .ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#] .ds ae a\h'-(\w'a'u*4/10)'e .ds Ae A\h'-(\w'A'u*4/10)'E . \" corrections for vroff .if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u' .if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u' . \" for low resolution devices (crt and lpr) .if \n(.H>23 .if \n(.V>19 \ \{\ . ds : e . ds 8 ss . ds o a . ds d- d\h'-1'\(ga . ds D- D\h'-1'\(hy . ds th \o'bp' . ds Th \o'LP' . ds ae ae . ds Ae AE .\} .rm #[ #] #H #V #F C .\" ======================================================================== .\" .IX Title "SCT_NEW 3" .TH SCT_NEW 3 "2023-09-11" "1.1.1w" "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" SCT_new, SCT_new_from_base64, SCT_free, SCT_LIST_free, SCT_get_version, SCT_set_version, SCT_get_log_entry_type, SCT_set_log_entry_type, SCT_get0_log_id, SCT_set0_log_id, SCT_set1_log_id, SCT_get_timestamp, SCT_set_timestamp, SCT_get_signature_nid, SCT_set_signature_nid, SCT_get0_signature, SCT_set0_signature, SCT_set1_signature, SCT_get0_extensions, SCT_set0_extensions, SCT_set1_extensions, SCT_get_source, SCT_set_source \&\- A Certificate Transparency Signed Certificate Timestamp .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #include <openssl/ct.h> \& \& typedef enum { \& CT_LOG_ENTRY_TYPE_NOT_SET = \-1, \& CT_LOG_ENTRY_TYPE_X509 = 0, \& CT_LOG_ENTRY_TYPE_PRECERT = 1 \& } ct_log_entry_type_t; \& \& typedef enum { \& SCT_VERSION_NOT_SET = \-1, \& SCT_VERSION_V1 = 0 \& } sct_version_t; \& \& typedef enum { \& SCT_SOURCE_UNKNOWN, \& SCT_SOURCE_TLS_EXTENSION, \& SCT_SOURCE_X509V3_EXTENSION, \& SCT_SOURCE_OCSP_STAPLED_RESPONSE \& } sct_source_t; \& \& SCT *SCT_new(void); \& SCT *SCT_new_from_base64(unsigned char version, \& const char *logid_base64, \& ct_log_entry_type_t entry_type, \& uint64_t timestamp, \& const char *extensions_base64, \& const char *signature_base64); \& \& void SCT_free(SCT *sct); \& void SCT_LIST_free(STACK_OF(SCT) *a); \& \& sct_version_t SCT_get_version(const SCT *sct); \& int SCT_set_version(SCT *sct, sct_version_t version); \& \& ct_log_entry_type_t SCT_get_log_entry_type(const SCT *sct); \& int SCT_set_log_entry_type(SCT *sct, ct_log_entry_type_t entry_type); \& \& size_t SCT_get0_log_id(const SCT *sct, unsigned char **log_id); \& int SCT_set0_log_id(SCT *sct, unsigned char *log_id, size_t log_id_len); \& int SCT_set1_log_id(SCT *sct, const unsigned char *log_id, size_t log_id_len); \& \& uint64_t SCT_get_timestamp(const SCT *sct); \& void SCT_set_timestamp(SCT *sct, uint64_t timestamp); \& \& int SCT_get_signature_nid(const SCT *sct); \& int SCT_set_signature_nid(SCT *sct, int nid); \& \& size_t SCT_get0_signature(const SCT *sct, unsigned char **sig); \& void SCT_set0_signature(SCT *sct, unsigned char *sig, size_t sig_len); \& int SCT_set1_signature(SCT *sct, const unsigned char *sig, size_t sig_len); \& \& size_t SCT_get0_extensions(const SCT *sct, unsigned char **ext); \& void SCT_set0_extensions(SCT *sct, unsigned char *ext, size_t ext_len); \& int SCT_set1_extensions(SCT *sct, const unsigned char *ext, size_t ext_len); \& \& sct_source_t SCT_get_source(const SCT *sct); \& int SCT_set_source(SCT *sct, sct_source_t source); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" Signed Certificate Timestamps (SCTs) are defined by \s-1RFC 6962,\s0 Section 3.2. They constitute a promise by a Certificate Transparency (\s-1CT\s0) log to publicly record a certificate. By cryptographically verifying that a log did indeed issue an \s-1SCT,\s0 some confidence can be gained that the certificate is publicly known. .PP An internal representation of an \s-1SCT\s0 can be created in one of two ways. The first option is to create a blank \s-1SCT,\s0 using \fBSCT_new()\fR, and then populate it using: .IP "\(bu" 2 \&\fBSCT_set_version()\fR to set the \s-1SCT\s0 version. .Sp Only \s-1SCT_VERSION_V1\s0 is currently supported. .IP "\(bu" 2 \&\fBSCT_set_log_entry_type()\fR to set the type of certificate the \s-1SCT\s0 was issued for: .Sp \&\fB\s-1CT_LOG_ENTRY_TYPE_X509\s0\fR for a normal certificate. \&\fB\s-1CT_LOG_ENTRY_TYPE_PRECERT\s0\fR for a pre-certificate. .IP "\(bu" 2 \&\fBSCT_set0_log_id()\fR or \fBSCT_set1_log_id()\fR to set the LogID of the \s-1CT\s0 log that the \s-1SCT\s0 came from. .Sp The former takes ownership, whereas the latter makes a copy. See \s-1RFC 6962,\s0 Section 3.2 for the definition of LogID. .IP "\(bu" 2 \&\fBSCT_set_timestamp()\fR to set the time the \s-1SCT\s0 was issued (epoch time in milliseconds). .IP "\(bu" 2 \&\fBSCT_set_signature_nid()\fR to set the \s-1NID\s0 of the signature. .IP "\(bu" 2 \&\fBSCT_set0_signature()\fR or \fBSCT_set1_signature()\fR to set the raw signature value. .Sp The former takes ownership, whereas the latter makes a copy. .IP "\(bu" 2 \&\fBSCT_set0_extensions()\fR or \fBSCT_set1_extensions\fR to provide \s-1SCT\s0 extensions. .Sp The former takes ownership, whereas the latter makes a copy. .PP Alternatively, the \s-1SCT\s0 can be pre-populated from the following data using \&\fBSCT_new_from_base64()\fR: .IP "\(bu" 2 The \s-1SCT\s0 version (only \s-1SCT_VERSION_V1\s0 is currently supported). .IP "\(bu" 2 The LogID (see \s-1RFC 6962,\s0 Section 3.2), base64 encoded. .IP "\(bu" 2 The type of certificate the \s-1SCT\s0 was issued for: \&\fB\s-1CT_LOG_ENTRY_TYPE_X509\s0\fR for a normal certificate. \&\fB\s-1CT_LOG_ENTRY_TYPE_PRECERT\s0\fR for a pre-certificate. .IP "\(bu" 2 The time that the \s-1SCT\s0 was issued (epoch time in milliseconds). .IP "\(bu" 2 The \s-1SCT\s0 extensions, base64 encoded. .IP "\(bu" 2 The \s-1SCT\s0 signature, base64 encoded. .PP \&\fBSCT_set_source()\fR can be used to record where the \s-1SCT\s0 was found (\s-1TLS\s0 extension, X.509 certificate extension or \s-1OCSP\s0 response). This is not required for verifying the \s-1SCT.\s0 .SH "NOTES" .IX Header "NOTES" Some of the setters return int, instead of void. These will all return 1 on success, 0 on failure. They will not make changes on failure. .PP All of the setters will reset the validation status of the \s-1SCT\s0 to \&\s-1SCT_VALIDATION_STATUS_NOT_SET\s0 (see \fBSCT_validate\fR\|(3)). .PP \&\fBSCT_set_source()\fR will call \fBSCT_set_log_entry_type()\fR if the type of certificate the \s-1SCT\s0 was issued for can be inferred from where the \s-1SCT\s0 was found. For example, an \s-1SCT\s0 found in an X.509 extension must have been issued for a pre\- certificate. .PP \&\fBSCT_set_source()\fR will not refuse unknown values. .SH "RETURN VALUES" .IX Header "RETURN VALUES" \&\fBSCT_set_version()\fR returns 1 if the specified version is supported, 0 otherwise. .PP \&\fBSCT_set_log_entry_type()\fR returns 1 if the specified log entry type is supported, 0 otherwise. .PP \&\fBSCT_set0_log_id()\fR and \fBSCT_set1_log_id\fR return 1 if the specified LogID is a valid \s-1SHA\-256\s0 hash, 0 otherwise. Additionally, \fBSCT_set1_log_id\fR returns 0 if malloc fails. .PP \&\fBSCT_set_signature_nid\fR returns 1 if the specified \s-1NID\s0 is supported, 0 otherwise. .PP \&\fBSCT_set1_extensions\fR and \fBSCT_set1_signature\fR return 1 if the supplied buffer is copied successfully, 0 otherwise (i.e. if malloc fails). .PP \&\fBSCT_set_source\fR returns 1 on success, 0 otherwise. .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fBct\fR\|(7), \&\fBSCT_validate\fR\|(3), \&\fBOBJ_nid2obj\fR\|(3) .SH "HISTORY" .IX Header "HISTORY" These functions were added in OpenSSL 1.1.0. .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 2016\-2017 The OpenSSL Project Authors. All Rights Reserved. .PP Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use this file except in compliance with the License. You can obtain a copy in the file \s-1LICENSE\s0 in the source distribution or at <https://www.openssl.org/source/license.html>.
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