CRYPT_GENSALT_IMPL(3C) Standard C Library Functions CRYPT_GENSALT_IMPL(3C)
crypt_gensalt_impl - generate salt for password encryption
#include <crypt.h>
char *crypt_gensalt_impl(char *gsbuffer, size_t gsbufflen,
const char *oldsalt, const struct passwd *userinfo,
const char **params);
The crypt_gensalt_impl() function is called by crypt_gensalt(3C) to
generate the salt for password encryption.
The gsbuffer argument is a pointer to an MT-safe buffer of size
gsbufflen.
The oldsalt and userinfo arguments are passed unchanged from
crypt_gensalt(3C).
The params argument is an argv-like null terminated vector of type
char *. The first element of params represents the mechanism token
name from crypt.conf(5). The remaining elements of params represent
strings of the form <parameter>[=<value>] to allow passing in
additional information from the crypt.conf entry, such as specifying
rounds information "rounds=4096".
The value returned by crypt_gensalt_impl() points to a thread-
specific buffer to be freed by the caller of crypt_gensalt(3C) after
calling crypt(3C).
Upon successful completion, crypt_gensalt_impl() returns a pointer to
the new salt. Otherwise a null pointer is returned and errno is set
to indicate the error.
The crypt_gensalt_impl() function will fail if:
EINVAL
The configuration file crypt.conf contains an invalid
entry.
ELIBACC
The required crypt shared library was not found.
ENOMEM
There is insufficient memory to perform hashing.
See attributes(7) for descriptions of the following attributes:
+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Evolving |
+--------------------+-----------------+
|MT-Level | MT-Safe |
+--------------------+-----------------+
passwd(1), crypt(3C), crypt_genhash_impl(3C), crypt_gensalt(3C),
getpassphrase(3C), crypt.conf(5), passwd(5), attributes(7)
June 10, 2002 CRYPT_GENSALT_IMPL(3C)
NAME
crypt_gensalt_impl - generate salt for password encryption
SYNOPSIS
#include <crypt.h>
char *crypt_gensalt_impl(char *gsbuffer, size_t gsbufflen,
const char *oldsalt, const struct passwd *userinfo,
const char **params);
DESCRIPTION
The crypt_gensalt_impl() function is called by crypt_gensalt(3C) to
generate the salt for password encryption.
The gsbuffer argument is a pointer to an MT-safe buffer of size
gsbufflen.
The oldsalt and userinfo arguments are passed unchanged from
crypt_gensalt(3C).
The params argument is an argv-like null terminated vector of type
char *. The first element of params represents the mechanism token
name from crypt.conf(5). The remaining elements of params represent
strings of the form <parameter>[=<value>] to allow passing in
additional information from the crypt.conf entry, such as specifying
rounds information "rounds=4096".
The value returned by crypt_gensalt_impl() points to a thread-
specific buffer to be freed by the caller of crypt_gensalt(3C) after
calling crypt(3C).
RETURN VALUES
Upon successful completion, crypt_gensalt_impl() returns a pointer to
the new salt. Otherwise a null pointer is returned and errno is set
to indicate the error.
ERRORS
The crypt_gensalt_impl() function will fail if:
EINVAL
The configuration file crypt.conf contains an invalid
entry.
ELIBACC
The required crypt shared library was not found.
ENOMEM
There is insufficient memory to perform hashing.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Evolving |
+--------------------+-----------------+
|MT-Level | MT-Safe |
+--------------------+-----------------+
SEE ALSO
passwd(1), crypt(3C), crypt_genhash_impl(3C), crypt_gensalt(3C),
getpassphrase(3C), crypt.conf(5), passwd(5), attributes(7)
June 10, 2002 CRYPT_GENSALT_IMPL(3C)