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Diffstat (limited to 'secure/lib/libcrypto/man/X509_LOOKUP_hash_dir.3')
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diff --git a/secure/lib/libcrypto/man/X509_LOOKUP_hash_dir.3 b/secure/lib/libcrypto/man/X509_LOOKUP_hash_dir.3 new file mode 100644 index 0000000000000..e1013802f1ed8 --- /dev/null +++ b/secure/lib/libcrypto/man/X509_LOOKUP_hash_dir.3 @@ -0,0 +1,260 @@ +.\" Automatically generated by Pod::Man 4.09 (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++. 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Always turn off hyphenation; it makes +.\" way too many mistakes in technical documents. +.if n .ad l +.nh +.SH "NAME" +X509_LOOKUP_hash_dir, X509_LOOKUP_file, X509_load_cert_file, X509_load_crl_file, X509_load_cert_crl_file \- Default OpenSSL certificate lookup methods +.SH "SYNOPSIS" +.IX Header "SYNOPSIS" +.Vb 1 +\& #include <openssl/x509_vfy.h> +\& +\& X509_LOOKUP_METHOD *X509_LOOKUP_hash_dir(void); +\& X509_LOOKUP_METHOD *X509_LOOKUP_file(void); +\& +\& int X509_load_cert_file(X509_LOOKUP *ctx, const char *file, int type); +\& int X509_load_crl_file(X509_LOOKUP *ctx, const char *file, int type); +\& int X509_load_cert_crl_file(X509_LOOKUP *ctx, const char *file, int type); +.Ve +.SH "DESCRIPTION" +.IX Header "DESCRIPTION" +\&\fBX509_LOOKUP_hash_dir\fR and \fBX509_LOOKUP_file\fR are two certificate +lookup methods to use with \fBX509_STORE\fR, provided by OpenSSL library. +.PP +Users of the library typically do not need to create instances of these +methods manually, they would be created automatically by +\&\fIX509_STORE_load_locations\fR\|(3) or +\&\fISSL_CTX_load_verify_locations\fR\|(3) +functions. +.PP +Internally loading of certificates and CRLs is implemented via functions +\&\fBX509_load_cert_crl_file\fR, \fBX509_load_cert_file\fR and +\&\fBX509_load_crl_file\fR. These functions support parameter \fItype\fR, which +can be one of constants \fB\s-1FILETYPE_PEM\s0\fR, \fB\s-1FILETYPE_ASN1\s0\fR and +\&\fB\s-1FILETYPE_DEFAULT\s0\fR. They load certificates and/or CRLs from specified +file into memory cache of \fBX509_STORE\fR objects which given \fBctx\fR +parameter is associated with. +.PP +Functions \fBX509_load_cert_file\fR and +\&\fBX509_load_crl_file\fR can load both \s-1PEM\s0 and \s-1DER\s0 formats depending of +type value. Because \s-1DER\s0 format cannot contain more than one certificate +or \s-1CRL\s0 object (while \s-1PEM\s0 can contain several concatenated \s-1PEM\s0 objects) +\&\fBX509_load_cert_crl_file\fR with \fB\s-1FILETYPE_ASN1\s0\fR is equivalent to +\&\fBX509_load_cert_file\fR. +.PP +Constant \fB\s-1FILETYPE_DEFAULT\s0\fR with \s-1NULL\s0 filename causes these functions +to load default certificate store file (see +\&\fIX509_STORE_set_default_paths\fR\|(3). +.PP +Functions return number of objects loaded from file or 0 in case of +error. +.PP +Both methods support adding several certificate locations into one +\&\fBX509_STORE\fR. +.PP +This page documents certificate store formats used by these methods and +caching policy. +.SS "File Method" +.IX Subsection "File Method" +The \fBX509_LOOKUP_file\fR method loads all the certificates or CRLs +present in a file into memory at the time the file is added as a +lookup source. +.PP +File format is \s-1ASCII\s0 text which contains concatenated \s-1PEM\s0 certificates +and CRLs. +.PP +This method should be used by applications which work with a small +set of CAs. +.SS "Hashed Directory Method" +.IX Subsection "Hashed Directory Method" +\&\fBX509_LOOKUP_hash_dir\fR is a more advanced method, which loads +certificates and CRLs on demand, and caches them in memory once +they are loaded. As of OpenSSL 1.0.0, it also checks for newer CRLs +upon each lookup, so that newer CRLs are as soon as they appear in +the directory. +.PP +The directory should contain one certificate or \s-1CRL\s0 per file in \s-1PEM\s0 format, +with a file name of the form \fIhash\fR.\fIN\fR for a certificate, or +\&\fIhash\fR.\fBr\fR\fIN\fR for a \s-1CRL.\s0 +The \fIhash\fR is the value returned by the \fIX509_NAME_hash\fR\|(3) function applied +to the subject name for certificates or issuer name for CRLs. +The hash can also be obtained via the \fB\-hash\fR option of the \fIx509\fR\|(1) or +\&\fIcrl\fR\|(1) commands. +.PP +The .\fIN\fR or .\fBr\fR\fIN\fR suffix is a sequence number that starts at zero, and is +incremented consecutively for each certificate or \s-1CRL\s0 with the same \fIhash\fR +value. +Gaps in the sequence numbers are not supported, it is assumed that there are no +more objects with the same hash beyond the first missing number in the +sequence. +.PP +Sequence numbers make it possible for the directory to contain multiple +certificates with same subject name hash value. +For example, it is possible to have in the store several certificates with same +subject or several CRLs with same issuer (and, for example, different validity +period). +.PP +When checking for new CRLs once one \s-1CRL\s0 for given hash value is +loaded, hash_dir lookup method checks only for certificates with +sequence number greater than that of the already cached \s-1CRL.\s0 +.PP +Note that the hash algorithm used for subject name hashing changed in OpenSSL +1.0.0, and all certificate stores have to be rehashed when moving from OpenSSL +0.9.8 to 1.0.0. +.PP +OpenSSL includes a \fIrehash\fR\|(1) utility which creates symlinks with correct +hashed names for all files with .pem suffix in a given directory. +.SH "RETURN VALUES" +.IX Header "RETURN VALUES" +\&\fIX509_LOOKUP_hash_dir()\fR and \fIX509_LOOKUP_file()\fR always return a valid +\&\fBX509_LOOKUP_METHOD\fR structure. +.PP +\&\fIX509_load_cert_file()\fR, \fIX509_load_crl_file()\fR and \fIX509_load_cert_crl_file()\fR return +the number of loaded objects or 0 on error. +.SH "SEE ALSO" +.IX Header "SEE ALSO" +\&\fIPEM_read_PrivateKey\fR\|(3), +\&\fIX509_STORE_load_locations\fR\|(3), +\&\fIX509_store_add_lookup\fR\|(3), +\&\fISSL_CTX_load_verify_locations\fR\|(3), +\&\fIX509_LOOKUP_meth_new\fR\|(3), +.SH "COPYRIGHT" +.IX Header "COPYRIGHT" +Copyright 2015\-2018 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>. |