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authorUlrich Drepper <drepper@redhat.com>2001-02-11 09:54:25 +0000
committerUlrich Drepper <drepper@redhat.com>2001-02-11 09:54:25 +0000
commitb642f10105b7980c704c5b00f1505864365456ab (patch)
tree78d75158f1d1054fdc023fb45fbda4d3958dd445 /manual/crypt.texi
parent8a2f1f5b5f7cdfcaf465415736a75a582bc5562a (diff)
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(Currency Symbol): Add INT_ constants and CODESET:
Diffstat (limited to 'manual/crypt.texi')
-rw-r--r--manual/crypt.texi52
1 files changed, 19 insertions, 33 deletions
diff --git a/manual/crypt.texi b/manual/crypt.texi
index 73f66f6..2e08abe 100644
--- a/manual/crypt.texi
+++ b/manual/crypt.texi
@@ -23,19 +23,13 @@ through a @dfn{one-way function}, a function which makes it difficult to
work out what its input was by looking at its output, before storing in
the file.
-The GNU C library already provides a one-way function based on MD5. The
-@code{crypt} add-on provides additional compatibility with the standard
-UNIX one-way function based on the Data Encryption Standard.
+The GNU C library already provides a one-way function based on MD5 and
+for compatibility with Unix systems the standard one-way function based
+on the Data Encryption Standard.
It also provides support for Secure RPC, and some library functions that
can be used to perform normal DES encryption.
-The add-on is not included in the main distribution of the GNU C library
-because some governments, most notably those of France, Russia,
-and the US, have very restrictive rules governing the distribution and
-use of encryption software. The first section below tries to describe some
-of those rules.
-
@menu
* Legal Problems:: This software can get you locked up, or worse.
* getpass:: Prompting the user for a password.
@@ -53,8 +47,8 @@ may help you when you try to find out what the laws of your country are.
Some countries require that you have a licence to use, posess, or import
cryptography. These countries are believed to include Byelorussia,
-Burma, France, India, Indonesia, Israel, Kazakhstan, Pakistan, Russia,
-and Saudi Arabia.
+Burma, India, Indonesia, Israel, Kazakhstan, Pakistan, Russia, and Saudi
+Arabia.
Some countries restrict the transmission of encrypted messages by radio;
some telecommunications carriers restrict the transmission of encrypted
@@ -94,7 +88,7 @@ in a convenient way.
@comment unistd.h
@comment BSD
-@deftypefun {char *} getpass (const char * @var{prompt})
+@deftypefun {char *} getpass (const char *@var{prompt})
@code{getpass} outputs @var{prompt}, then reads a string in from the
terminal without echoing it. It tries to connect to the real terminal,
@@ -129,7 +123,7 @@ The substitute takes the same parameters as @code{getline}
@comment crypt.h
@comment BSD, SVID
-@deftypefun {char *} crypt (const char * @var{key}, const char * @var{salt})
+@deftypefun {char *} crypt (const char *@var{key}, const char *@var{salt})
The @code{crypt} function takes a password, @var{key}, as a string, and
a @var{salt} character array which is described below, and returns a
@@ -193,7 +187,7 @@ for a password and prints ``Access granted.'' if the user types
@comment crypt.h
@comment GNU
-@deftypefun {char *} crypt_r (const char * @var{key}, const char * @var{salt}, {struct crypt_data *} @var{data})
+@deftypefun {char *} crypt_r (const char *@var{key}, const char *@var{salt}, {struct crypt_data *} @var{data})
The @code{crypt_r} function does the same thing as @code{crypt}, but
takes an extra parameter which includes space for its result (among
@@ -238,7 +232,7 @@ specifies the unused bits.
@comment crypt.h
@comment BSD, SVID
-@deftypefun void setkey (const char * @var{key})
+@deftypefun void setkey (const char *@var{key})
The @code{setkey} function sets an internal data structure to be an
expanded form of @var{key}. @var{key} is specified as an array of 64
@@ -249,7 +243,7 @@ parity.
@comment crypt.h
@comment BSD, SVID
-@deftypefun void encrypt (char * @var{block}, int @var{edflag})
+@deftypefun void encrypt (char *@var{block}, int @var{edflag})
The @code{encrypt} function encrypts @var{block} if
@var{edflag} is 0, otherwise it decrypts @var{block}, using a key
@@ -262,10 +256,10 @@ stored in a @code{char}, but there are no parity bits in @var{block}.
@comment crypt.h
@comment GNU
-@deftypefun void setkey_r (const char * @var{key}, {struct crypt_data *} @var{data})
+@deftypefun void setkey_r (const char *@var{key}, {struct crypt_data *} @var{data})
@comment crypt.h
@comment GNU
-@deftypefunx void encrypt_r (char * @var{block}, int @var{edflag}, {struct crypt_data *} @var{data})
+@deftypefunx void encrypt_r (char *@var{block}, int @var{edflag}, {struct crypt_data *} @var{data})
These are reentrant versions of @code{setkey} and @code{encrypt}. The
only difference is the extra parameter, which stores the expanded
@@ -284,7 +278,7 @@ recommended instead.
@comment rpc/des_crypt.h
@comment SUNRPC
-@deftypefun int ecb_crypt (char * @var{key}, char * @var{blocks}, unsigned @var{len}, unsigned @var{mode})
+@deftypefun int ecb_crypt (char *@var{key}, char *@var{blocks}, unsigned @var{len}, unsigned @var{mode})
The function @code{ecb_crypt} encrypts or decrypts one or more blocks
using DES. Each block is encrypted independently.
@@ -303,25 +297,22 @@ The result of the encryption replaces the input in @var{blocks}.
The @var{mode} parameter is the bitwise OR of two of the following:
-@table @code
+@vtable @code
@comment rpc/des_crypt.h
@comment SUNRPC
@item DES_ENCRYPT
-@findex DES_ENCRYPT
This constant, used in the @var{mode} parameter, specifies that
@var{blocks} is to be encrypted.
@comment rpc/des_crypt.h
@comment SUNRPC
@item DES_DECRYPT
-@findex DES_DECRYPT
This constant, used in the @var{mode} parameter, specifies that
@var{blocks} is to be decrypted.
@comment rpc/des_crypt.h
@comment SUNRPC
@item DES_HW
-@findex DES_HW
This constant, used in the @var{mode} parameter, asks to use a hardware
device. If no hardware device is available, encryption happens anyway,
but in software.
@@ -329,30 +320,26 @@ but in software.
@comment rpc/des_crypt.h
@comment SUNRPC
@item DES_SW
-@findex DES_SW
This constant, used in the @var{mode} parameter, specifies that no
hardware device is to be used.
-@end table
+@end vtable
The result of the function will be one of these values:
-@table @code
+@vtable @code
@comment rpc/des_crypt.h
@comment SUNRPC
@item DESERR_NONE
-@findex DESERR_NONE
The encryption succeeded.
@comment rpc/des_crypt.h
@comment SUNRPC
@item DESERR_NOHWDEVICE
-@findex DESERR_NOHWDEVICE
The encryption succeeded, but there was no hardware device available.
@comment rpc/des_crypt.h
@comment SUNRPC
@item DESERR_HWERROR
-@findex DESERR_HWERROR
The encryption failed because of a hardware problem. In the GNU
library, this error code is also returned if the @code{crypt} add-on was
not used to build the library.
@@ -360,10 +347,9 @@ not used to build the library.
@comment rpc/des_crypt.h
@comment SUNRPC
@item DESERR_BADPARAM
-@findex DESERR_BADPARAM
The encryption failed because of a bad parameter, for instance @var{len}
is not a multiple of 8 or @var{len} is larger than @code{DES_MAXDATA}.
-@end table
+@end vtable
@end deftypefun
@comment rpc/des_crypt.h
@@ -375,7 +361,7 @@ This macro returns 1 if @var{err} is a `success' result code from
@comment rpc/des_crypt.h
@comment SUNRPC
-@deftypefun int cbc_crypt (char * @var{key}, char * @var{blocks}, unsigned @var{len}, unsigned @var{mode}, char * @var{ivec})
+@deftypefun int cbc_crypt (char *@var{key}, char *@var{blocks}, unsigned @var{len}, unsigned @var{mode}, char *@var{ivec})
The function @code{cbc_crypt} encrypts or decrypts one or more blocks
using DES in Cipher Block Chaining mode.
@@ -401,7 +387,7 @@ Otherwise, all the parameters are similar to those for @code{ecb_crypt}.
@comment rpc/des_crypt.h
@comment SUNRPC
-@deftypefun void des_setparity (char * @var{key})
+@deftypefun void des_setparity (char *@var{key})
The function @code{des_setparity} changes the 64-bit @var{key}, stored
packed in 8-bit bytes, to have odd parity by altering the low bits of