Current Path :
/
opt
/
alt
/
openssl11
/
share
/
man
/
man3
/
Or
Select Your Path :
Upload File :
New :
File
Dir
//opt/alt/openssl11/share/man/man3/PEM_do_header.3ssl
.\" Automatically generated by Pod::Man 2.27 (Pod::Simple 3.28) .\" .\" 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 turned on, 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 "PEM_READ 3" .TH PEM_READ 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" PEM_write, PEM_write_bio, PEM_read, PEM_read_bio, PEM_do_header, PEM_get_EVP_CIPHER_INFO \&\- PEM encoding routines .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #include <openssl/pem.h> \& \& int PEM_write(FILE *fp, const char *name, const char *header, \& const unsigned char *data, long len) \& int PEM_write_bio(BIO *bp, const char *name, const char *header, \& const unsigned char *data, long len) \& \& int PEM_read(FILE *fp, char **name, char **header, \& unsigned char **data, long *len); \& int PEM_read_bio(BIO *bp, char **name, char **header, \& unsigned char **data, long *len); \& \& int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cinfo); \& int PEM_do_header(EVP_CIPHER_INFO *cinfo, unsigned char *data, long *len, \& pem_password_cb *cb, void *u); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" These functions read and write PEM-encoded objects, using the \s-1PEM\s0 type \fBname\fR, any additional \fBheader\fR information, and the raw \&\fBdata\fR of length \fBlen\fR. .PP \&\s-1PEM\s0 is the term used for binary content encoding first defined in \s-1IETF RFC 1421. \s0 The content is a series of base64\-encoded lines, surrounded by begin/end markers each on their own line. For example: .PP .Vb 4 \& \-\-\-\-\-BEGIN PRIVATE KEY\-\-\-\-\- \& MIICdg.... \& ... bhTQ== \& \-\-\-\-\-END PRIVATE KEY\-\-\-\-\- .Ve .PP Optional header line(s) may appear after the begin line, and their existence depends on the type of object being written or read. .PP \&\fIPEM_write()\fR writes to the file \fBfp\fR, while \fIPEM_write_bio()\fR writes to the \s-1BIO \s0\fBbp\fR. The \fBname\fR is the name to use in the marker, the \&\fBheader\fR is the header value or \s-1NULL,\s0 and \fBdata\fR and \fBlen\fR specify the data and its length. .PP The final \fBdata\fR buffer is typically an \s-1ASN.1\s0 object which can be decoded with the \fBd2i\fR function appropriate to the type \fBname\fR; see \fId2i_X509\fR\|(3) for examples. .PP \&\fIPEM_read()\fR reads from the file \fBfp\fR, while \fIPEM_read_bio()\fR reads from the \s-1BIO \s0\fBbp\fR. Both skip any non-PEM data that precedes the start of the next \s-1PEM\s0 object. When an object is successfully retrieved, the type name from the \*(L"\-\-\-\-BEGIN <type>\-\-\-\-\-\*(R" is returned via the \fBname\fR argument, any encapsulation headers are returned in \fBheader\fR and the base64\-decoded content and its length are returned via \fBdata\fR and \fBlen\fR respectively. The \fBname\fR, \fBheader\fR and \fBdata\fR pointers are allocated via \fIOPENSSL_malloc()\fR and should be freed by the caller via \fIOPENSSL_free()\fR when no longer needed. .PP \&\fIPEM_get_EVP_CIPHER_INFO()\fR can be used to determine the \fBdata\fR returned by \&\fIPEM_read()\fR or \fIPEM_read_bio()\fR is encrypted and to retrieve the associated cipher and \s-1IV.\s0 The caller passes a pointer to structure of type \fB\s-1EVP_CIPHER_INFO\s0\fR via the \&\fBcinfo\fR argument and the \fBheader\fR returned via \fIPEM_read()\fR or \fIPEM_read_bio()\fR. If the call is successful 1 is returned and the cipher and \s-1IV\s0 are stored at the address pointed to by \fBcinfo\fR. When the header is malformed, or not supported or when the cipher is unknown or some internal error happens 0 is returned. This function is deprecated, see \fB\s-1NOTES\s0\fR below. .PP \&\fIPEM_do_header()\fR can then be used to decrypt the data if the header indicates encryption. The \fBcinfo\fR argument is a pointer to the structure initialized by the previous call to \fIPEM_get_EVP_CIPHER_INFO()\fR. The \fBdata\fR and \fBlen\fR arguments are those returned by the previous call to \&\fIPEM_read()\fR or \fIPEM_read_bio()\fR. The \fBcb\fR and \fBu\fR arguments make it possible to override the default password prompt function as described in \fIPEM_read_PrivateKey\fR\|(3). On successful completion the \fBdata\fR is decrypted in place, and \fBlen\fR is updated to indicate the plaintext length. This function is deprecated, see \fB\s-1NOTES\s0\fR below. .PP If the data is a priori known to not be encrypted, then neither \fIPEM_do_header()\fR nor \fIPEM_get_EVP_CIPHER_INFO()\fR need be called. .SH "RETURN VALUES" .IX Header "RETURN VALUES" \&\fIPEM_read()\fR and \fIPEM_read_bio()\fR return 1 on success and 0 on failure, the latter includes the case when no more \s-1PEM\s0 objects remain in the input file. To distinguish end of file from more serious errors the caller must peek at the error stack and check for \fB\s-1PEM_R_NO_START_LINE\s0\fR, which indicates that no more \&\s-1PEM\s0 objects were found. See \fIERR_peek_last_error\fR\|(3), \s-1\fIERR_GET_REASON\s0\fR\|(3). .PP \&\fIPEM_get_EVP_CIPHER_INFO()\fR and \fIPEM_do_header()\fR return 1 on success, and 0 on failure. The \fBdata\fR is likely meaningless if these functions fail. .SH "NOTES" .IX Header "NOTES" The \fIPEM_get_EVP_CIPHER_INFO()\fR and \fIPEM_do_header()\fR functions are deprecated. This is because the underlying \s-1PEM\s0 encryption format is obsolete, and should be avoided. It uses an encryption format with an OpenSSL-specific key-derivation function, which employs \s-1MD5\s0 with an iteration count of 1! Instead, private keys should be stored in PKCS#8 form, with a strong PKCS#5 v2.0 \s-1PBE.\s0 See \fIPEM_write_PrivateKey\fR\|(3) and \fId2i_PKCS8PrivateKey_bio\fR\|(3). .PP \&\fIPEM_do_header()\fR makes no assumption regarding the pass phrase received from the password callback. It will simply be treated as a byte sequence. .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fIERR_peek_last_error\fR\|(3), \s-1\fIERR_GET_LIB\s0\fR\|(3), \&\fId2i_PKCS8PrivateKey_bio\fR\|(3), \&\fIpassphrase\-encoding\fR\|(7) .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 1998\-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>.
