man pages section 3: Basic Library Functions

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Updated: July 2014
 
 

crypt_genhash_impl(3C)

Name

crypt_genhash_impl - generate encrypted password

Synopsis

#include <crypt.h>

char *crypt_genhash_impl(char *ctbuffer, size_t ctbufflen,
     const char *plaintext, const char *salt, const char **params);

Description

The crypt_genhash_impl() function is called by crypt(3C) to generate the encrypted password plaintext.

The ctbuffer argument is a pointer to an MT-safe buffer of ctbufflen size that is used to return the result.

The salt argument is the salt used in encoding.

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(4). 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 specifing rounds information "rounds=4096".

The crypt_genhash_impl() function must not free(3C) ctbufflen on error.

Return Values

Upon successful completion, crypt_genhash_impl() returns a pointer to the encoded version of plaintext. Otherwise a null pointer is returned and errno is set to indicate the error.

Errors

The crypt_genhash_impl() function will fail if:

EINVAL

The configuration file crypt.conf contains an invalid entry.

ELIBACC

The required shared library was not found.

ENOMEM

There is insufficient memory to perform hashing.

Attributes

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE
ATTRIBUTE VALUE
Interface Stability
Committed
MT-Level
MT-Safe

See Also

passwd(1), crypt(3C), crypt_gensalt_impl(3C), free(3C), getpassphrase(3C), crypt.conf (4), passwd(4), attributes (5)