diff options
Diffstat (limited to 'manual')
| -rw-r--r-- | manual/Makefile | 5 | ||||
| -rw-r--r-- | manual/conf.texi | 4 | ||||
| -rw-r--r-- | manual/crypt.texi | 3 | ||||
| -rw-r--r-- | manual/examples/genpass.c | 32 | ||||
| -rw-r--r-- | manual/examples/mygetpass.c | 25 | ||||
| -rw-r--r-- | manual/examples/testpass.c | 26 |
6 files changed, 89 insertions, 6 deletions
diff --git a/manual/Makefile b/manual/Makefile index cc4e200c8a..51ada2c6af 100644 --- a/manual/Makefile +++ b/manual/Makefile @@ -55,7 +55,8 @@ chapters = $(addsuffix .texi, \ intro errno memory ctype string charset locale \ message search pattern io stdio llio filesys \ pipe socket terminal math arith time setjmp \ - signal startup process job nss users sysinfo conf) + signal startup process job nss users sysinfo conf\ + crypt) add-chapters = $(wildcard $(foreach d, $(add-ons), ../$d/$d.texi)) appendices = lang.texi header.texi install.texi maint.texi contrib.texi @@ -69,7 +70,7 @@ examples = $(filter-out $(foreach d, $(add-ons), ../$d/%.c.texi), \ $(filter %.c.texi, $(texis))) # Kludge: implicit rule so Make knows the one command does it all. -chapters.% top-menu.%: libc-texinfo.sh $(texis) +chapters.% top-menu.%: libc-texinfo.sh $(texis) Makefile AWK=$(AWK) $(SHELL) $< '$(chapters)' '$(add-chapters)' '$(appendices)' libc.dvi libc.pdf libc.info: chapters.texi top-menu.texi libm-err.texi diff --git a/manual/conf.texi b/manual/conf.texi index bd866eccaa..a684a5b2e2 100644 --- a/manual/conf.texi +++ b/manual/conf.texi @@ -1,6 +1,4 @@ -@c This node must have no pointers. -@node System Configuration -@c @node System Configuration, , System Information, Top +@node System Configuration, Cryptographic Functions, System Information, Top @c %MENU% Parameters describing operating system limits @chapter System Configuration Parameters diff --git a/manual/crypt.texi b/manual/crypt.texi index 1a4177a024..f17fab9b59 100644 --- a/manual/crypt.texi +++ b/manual/crypt.texi @@ -1,5 +1,6 @@ +@c This node must have no pointers. @node Cryptographic Functions -@c @node Cryptographic Functions, , Top, Top +@c @node Cryptographic Functions, , System Configuration, Top @chapter DES Encryption and Password Handling @c %MENU% DES encryption and password handling diff --git a/manual/examples/genpass.c b/manual/examples/genpass.c new file mode 100644 index 0000000000..a7626dbed5 --- /dev/null +++ b/manual/examples/genpass.c @@ -0,0 +1,32 @@ +#include <stdio.h> +#include <time.h> +#include <unistd.h> +#include <crypt.h> + +int +main(void) +{ + unsigned long seed[2]; + char salt[] = "$1$........"; + const char *const seedchars = + "./0123456789ABCDEFGHIJKLMNOPQRST" + "UVWXYZabcdefghijklmnopqrstuvwxyz"; + char *password; + int i; + + /* Generate a (not very) random seed. + You should do it better than this... */ + seed[0] = time(NULL); + seed[1] = getpid() ^ (seed[0] >> 14 & 0x30000); + + /* Turn it into printable characters from `seedchars'. */ + for (i = 0; i < 8; i++) + salt[3+i] = seedchars[(seed[i/5] >> (i%5)*6) & 0x3f]; + + /* Read in the user's password and encrypt it. */ + password = crypt(getpass("Password:"), salt); + + /* Print the results. */ + puts(password); + return 0; +} diff --git a/manual/examples/mygetpass.c b/manual/examples/mygetpass.c new file mode 100644 index 0000000000..6fe06f4637 --- /dev/null +++ b/manual/examples/mygetpass.c @@ -0,0 +1,25 @@ +#include <termios.h> +#include <stdio.h> + +ssize_t +my_getpass (char **lineptr, size_t *n, FILE *stream) +{ + struct termios old, new; + int nread; + + /* Turn echoing off and fail if we can't. */ + if (tcgetattr (fileno (stream), &old) != 0) + return -1; + new = old; + new.c_lflag &= ~ECHO; + if (tcsetattr (fileno (stream), TCSAFLUSH, &new) != 0) + return -1; + + /* Read the password. */ + nread = getline (lineptr, n, stream); + + /* Restore terminal. */ + (void) tcsetattr (fileno (stream), TCSAFLUSH, &old); + + return nread; +} diff --git a/manual/examples/testpass.c b/manual/examples/testpass.c new file mode 100644 index 0000000000..5bd616d2a0 --- /dev/null +++ b/manual/examples/testpass.c @@ -0,0 +1,26 @@ +#include <stdio.h> +#include <string.h> +#include <unistd.h> +#include <crypt.h> + +int +main(void) +{ + /* Hashed form of "GNU libc manual". */ + const char *const pass = "$1$/iSaq7rB$EoUw5jJPPvAPECNaaWzMK/"; + + char *result; + int ok; + +/*@group*/ + /* Read in the user's password and encrypt it, + passing the expected password in as the salt. */ + result = crypt(getpass("Password:"), pass); +/*@end group*/ + + /* Test the result. */ + ok = strcmp (result, pass) == 0; + + puts(ok ? "Access granted." : "Access denied."); + return ok ? 0 : 1; +} |