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Diffstat (limited to 'libraries/liblutil/passwd.c')
| -rw-r--r-- | libraries/liblutil/passwd.c | 935 |
1 files changed, 935 insertions, 0 deletions
diff --git a/libraries/liblutil/passwd.c b/libraries/liblutil/passwd.c new file mode 100644 index 0000000..653cb5a --- /dev/null +++ b/libraries/liblutil/passwd.c @@ -0,0 +1,935 @@ +/* $OpenLDAP$ */ +/* This work is part of OpenLDAP Software <http://www.openldap.org/>. + * + * Copyright 1998-2022 The OpenLDAP Foundation. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in the file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * <http://www.OpenLDAP.org/license.html>. + */ + +/* + * int lutil_passwd( + * const struct berval *passwd, + * const struct berval *cred, + * const char **schemes ) + * + * Returns true if user supplied credentials (cred) matches + * the stored password (passwd). + * + * Due to the use of the crypt(3) function + * this routine is NOT thread-safe. + */ + +#include "portable.h" + +#include <stdio.h> +#include <ac/stdlib.h> +#include <ac/string.h> +#include <ac/unistd.h> +#include <ac/param.h> + +#ifdef SLAPD_CRYPT +# include <ac/crypt.h> + +# if defined( HAVE_GETPWNAM ) && defined( HAVE_STRUCT_PASSWD_PW_PASSWD ) +# ifdef HAVE_SHADOW_H +# include <shadow.h> +# endif +# ifdef HAVE_PWD_H +# include <pwd.h> +# endif +# ifdef HAVE_AIX_SECURITY +# include <userpw.h> +# endif +# endif +#endif + +#include <lber.h> + +#include "ldap_pvt.h" +#include "lber_pvt.h" + +#include "lutil_md5.h" +#include "lutil_sha1.h" +#include "lutil.h" + +static const unsigned char crypt64[] = + "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890./"; + +#ifdef SLAPD_CRYPT +static char *salt_format = NULL; +static lutil_cryptfunc lutil_crypt; +lutil_cryptfunc *lutil_cryptptr = lutil_crypt; +#endif + +/* KLUDGE: + * chk_fn is NULL iff name is {CLEARTEXT} + * otherwise, things will break + */ +struct pw_scheme { + struct berval name; + LUTIL_PASSWD_CHK_FUNC *chk_fn; + LUTIL_PASSWD_HASH_FUNC *hash_fn; +}; + +struct pw_slist { + struct pw_slist *next; + struct pw_scheme s; +}; + +/* password check routines */ + +#define SALT_SIZE 4 + +static LUTIL_PASSWD_CHK_FUNC chk_md5; +static LUTIL_PASSWD_CHK_FUNC chk_smd5; +static LUTIL_PASSWD_HASH_FUNC hash_smd5; +static LUTIL_PASSWD_HASH_FUNC hash_md5; + + +#ifdef LUTIL_SHA1_BYTES +static LUTIL_PASSWD_CHK_FUNC chk_ssha1; +static LUTIL_PASSWD_CHK_FUNC chk_sha1; +static LUTIL_PASSWD_HASH_FUNC hash_sha1; +static LUTIL_PASSWD_HASH_FUNC hash_ssha1; +#endif + + +#ifdef SLAPD_CRYPT +static LUTIL_PASSWD_CHK_FUNC chk_crypt; +static LUTIL_PASSWD_HASH_FUNC hash_crypt; + +#if defined( HAVE_GETPWNAM ) && defined( HAVE_STRUCT_PASSWD_PW_PASSWD ) +static LUTIL_PASSWD_CHK_FUNC chk_unix; +#endif +#endif + +/* password hash routines */ + +#ifdef SLAPD_CLEARTEXT +static LUTIL_PASSWD_HASH_FUNC hash_clear; +#endif + +static struct pw_slist *pw_schemes; +static int pw_inited; + +static const struct pw_scheme pw_schemes_default[] = +{ +#ifdef LUTIL_SHA1_BYTES + { BER_BVC("{SSHA}"), chk_ssha1, hash_ssha1 }, + { BER_BVC("{SHA}"), chk_sha1, hash_sha1 }, +#endif + + { BER_BVC("{SMD5}"), chk_smd5, hash_smd5 }, + { BER_BVC("{MD5}"), chk_md5, hash_md5 }, + +#ifdef SLAPD_CRYPT + { BER_BVC("{CRYPT}"), chk_crypt, hash_crypt }, +# if defined( HAVE_GETPWNAM ) && defined( HAVE_STRUCT_PASSWD_PW_PASSWD ) + { BER_BVC("{UNIX}"), chk_unix, NULL }, +# endif +#endif + +#ifdef SLAPD_CLEARTEXT + /* pseudo scheme */ + { BER_BVC("{CLEARTEXT}"), NULL, hash_clear }, +#endif + + { BER_BVNULL, NULL, NULL } +}; + +int lutil_passwd_add( + struct berval *scheme, + LUTIL_PASSWD_CHK_FUNC *chk, + LUTIL_PASSWD_HASH_FUNC *hash ) +{ + struct pw_slist *ptr; + + if (!pw_inited) lutil_passwd_init(); + + ptr = ber_memalloc( sizeof( struct pw_slist )); + if (!ptr) return -1; + ptr->next = pw_schemes; + ptr->s.name = *scheme; + ptr->s.chk_fn = chk; + ptr->s.hash_fn = hash; + pw_schemes = ptr; + return 0; +} + +void lutil_passwd_init() +{ + struct pw_scheme *s; + + pw_inited = 1; + + for( s=(struct pw_scheme *)pw_schemes_default; s->name.bv_val; s++) { + if ( lutil_passwd_add( &s->name, s->chk_fn, s->hash_fn ) ) break; + } +} + +void lutil_passwd_destroy() +{ + struct pw_slist *ptr, *next; + + for( ptr=pw_schemes; ptr; ptr=next ) { + next = ptr->next; + ber_memfree( ptr ); + } +} + +static const struct pw_scheme *get_scheme( + const char* scheme ) +{ + struct pw_slist *pws; + struct berval bv; + + if (!pw_inited) lutil_passwd_init(); + + bv.bv_val = strchr( scheme, '}' ); + if ( !bv.bv_val ) + return NULL; + + bv.bv_len = bv.bv_val - scheme + 1; + bv.bv_val = (char *) scheme; + + for( pws=pw_schemes; pws; pws=pws->next ) { + if ( ber_bvstrcasecmp(&bv, &pws->s.name ) == 0 ) { + return &(pws->s); + } + } + + return NULL; +} + +int lutil_passwd_scheme( + const char* scheme ) +{ + if( scheme == NULL ) { + return 0; + } + + return get_scheme(scheme) != NULL; +} + + +static int is_allowed_scheme( + const char* scheme, + const char** schemes ) +{ + int i; + + if( schemes == NULL ) return 1; + + for( i=0; schemes[i] != NULL; i++ ) { + if( strcasecmp( scheme, schemes[i] ) == 0 ) { + return 1; + } + } + return 0; +} + +static struct berval *passwd_scheme( + const struct pw_scheme *scheme, + const struct berval * passwd, + struct berval *bv, + const char** allowed ) +{ + if( !is_allowed_scheme( scheme->name.bv_val, allowed ) ) { + return NULL; + } + + if( passwd->bv_len >= scheme->name.bv_len ) { + if( strncasecmp( passwd->bv_val, scheme->name.bv_val, scheme->name.bv_len ) == 0 ) { + bv->bv_val = &passwd->bv_val[scheme->name.bv_len]; + bv->bv_len = passwd->bv_len - scheme->name.bv_len; + + return bv; + } + } + + return NULL; +} + +/* + * Return 0 if creds are good. + */ +int +lutil_passwd( + const struct berval *passwd, /* stored passwd */ + const struct berval *cred, /* user cred */ + const char **schemes, + const char **text ) +{ + struct pw_slist *pws; + + if ( text ) *text = NULL; + + if (cred == NULL || cred->bv_len == 0 || + passwd == NULL || passwd->bv_len == 0 ) + { + return -1; + } + + if (!pw_inited) lutil_passwd_init(); + + for( pws=pw_schemes; pws; pws=pws->next ) { + if( pws->s.chk_fn ) { + struct berval x; + struct berval *p = passwd_scheme( &(pws->s), + passwd, &x, schemes ); + + if( p != NULL ) { + return (pws->s.chk_fn)( &(pws->s.name), p, cred, text ); + } + } + } + +#ifdef SLAPD_CLEARTEXT + /* Do we think there is a scheme specifier here that we + * didn't recognize? Assume a scheme name is at least 1 character. + */ + if (( passwd->bv_val[0] == '{' ) && + ( ber_bvchr( passwd, '}' ) > passwd->bv_val+1 )) + { + return 1; + } + if( is_allowed_scheme("{CLEARTEXT}", schemes ) ) { + return ( passwd->bv_len == cred->bv_len ) ? + memcmp( passwd->bv_val, cred->bv_val, passwd->bv_len ) + : 1; + } +#endif + return 1; +} + +int lutil_passwd_generate( struct berval *pw, ber_len_t len ) +{ + + if( len < 1 ) return -1; + + pw->bv_len = len; + pw->bv_val = ber_memalloc( len + 1 ); + + if( pw->bv_val == NULL ) { + return -1; + } + + if( lutil_entropy( (unsigned char *) pw->bv_val, pw->bv_len) < 0 ) { + return -1; + } + + for( len = 0; len < pw->bv_len; len++ ) { + pw->bv_val[len] = crypt64[ + pw->bv_val[len] % (sizeof(crypt64)-1) ]; + } + + pw->bv_val[len] = '\0'; + + return 0; +} + +int lutil_passwd_hash( + const struct berval * passwd, + const char * method, + struct berval *hash, + const char **text ) +{ + const struct pw_scheme *sc = get_scheme( method ); + + hash->bv_val = NULL; + hash->bv_len = 0; + + if( sc == NULL ) { + if( text ) *text = "scheme not recognized"; + return -1; + } + + if( ! sc->hash_fn ) { + if( text ) *text = "scheme provided no hash function"; + return -1; + } + + if( text ) *text = NULL; + + return (sc->hash_fn)( &sc->name, passwd, hash, text ); +} + +/* pw_string is only called when SLAPD_CRYPT is defined */ +#if defined(SLAPD_CRYPT) +static int pw_string( + const struct berval *sc, + struct berval *passwd ) +{ + struct berval pw; + + pw.bv_len = sc->bv_len + passwd->bv_len; + pw.bv_val = ber_memalloc( pw.bv_len + 1 ); + + if( pw.bv_val == NULL ) { + return LUTIL_PASSWD_ERR; + } + + AC_MEMCPY( pw.bv_val, sc->bv_val, sc->bv_len ); + AC_MEMCPY( &pw.bv_val[sc->bv_len], passwd->bv_val, passwd->bv_len ); + + pw.bv_val[pw.bv_len] = '\0'; + *passwd = pw; + + return LUTIL_PASSWD_OK; +} +#endif /* SLAPD_CRYPT */ + +int lutil_passwd_string64( + const struct berval *sc, + const struct berval *hash, + struct berval *b64, + const struct berval *salt ) +{ + int rc; + struct berval string; + size_t b64len; + + if( salt ) { + /* need to base64 combined string */ + string.bv_len = hash->bv_len + salt->bv_len; + string.bv_val = ber_memalloc( string.bv_len + 1 ); + + if( string.bv_val == NULL ) { + return LUTIL_PASSWD_ERR; + } + + AC_MEMCPY( string.bv_val, hash->bv_val, + hash->bv_len ); + AC_MEMCPY( &string.bv_val[hash->bv_len], salt->bv_val, + salt->bv_len ); + string.bv_val[string.bv_len] = '\0'; + + } else { + string = *hash; + } + + b64len = LUTIL_BASE64_ENCODE_LEN( string.bv_len ) + 1; + b64->bv_len = b64len + sc->bv_len; + b64->bv_val = ber_memalloc( b64->bv_len + 1 ); + + if( b64->bv_val == NULL ) { + if( salt ) ber_memfree( string.bv_val ); + return LUTIL_PASSWD_ERR; + } + + AC_MEMCPY(b64->bv_val, sc->bv_val, sc->bv_len); + + rc = lutil_b64_ntop( + (unsigned char *) string.bv_val, string.bv_len, + &b64->bv_val[sc->bv_len], b64len ); + + if( salt ) ber_memfree( string.bv_val ); + + if( rc < 0 ) { + return LUTIL_PASSWD_ERR; + } + + /* recompute length */ + b64->bv_len = sc->bv_len + rc; + assert( strlen(b64->bv_val) == b64->bv_len ); + return LUTIL_PASSWD_OK; +} + +/* PASSWORD CHECK ROUTINES */ + +#ifdef LUTIL_SHA1_BYTES +static int chk_ssha1( + const struct berval *sc, + const struct berval * passwd, + const struct berval * cred, + const char **text ) +{ + lutil_SHA1_CTX SHA1context; + unsigned char SHA1digest[LUTIL_SHA1_BYTES]; + int rc; + unsigned char *orig_pass = NULL; + size_t decode_len = LUTIL_BASE64_DECODE_LEN(passwd->bv_len); + + /* safety check -- must have some salt */ + if (decode_len <= sizeof(SHA1digest)) { + return LUTIL_PASSWD_ERR; + } + + /* decode base64 password */ + orig_pass = (unsigned char *) ber_memalloc(decode_len + 1); + + if( orig_pass == NULL ) return LUTIL_PASSWD_ERR; + + rc = lutil_b64_pton(passwd->bv_val, orig_pass, decode_len); + + /* safety check -- must have some salt */ + if (rc <= (int)(sizeof(SHA1digest))) { + ber_memfree(orig_pass); + return LUTIL_PASSWD_ERR; + } + + /* hash credentials with salt */ + lutil_SHA1Init(&SHA1context); + lutil_SHA1Update(&SHA1context, + (const unsigned char *) cred->bv_val, cred->bv_len); + lutil_SHA1Update(&SHA1context, + (const unsigned char *) &orig_pass[sizeof(SHA1digest)], + rc - sizeof(SHA1digest)); + lutil_SHA1Final(SHA1digest, &SHA1context); + + /* compare */ + rc = memcmp((char *)orig_pass, (char *)SHA1digest, sizeof(SHA1digest)); + ber_memfree(orig_pass); + return rc ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK; +} + +static int chk_sha1( + const struct berval *sc, + const struct berval * passwd, + const struct berval * cred, + const char **text ) +{ + lutil_SHA1_CTX SHA1context; + unsigned char SHA1digest[LUTIL_SHA1_BYTES]; + int rc; + unsigned char *orig_pass = NULL; + size_t decode_len = LUTIL_BASE64_DECODE_LEN(passwd->bv_len); + + /* safety check */ + if (decode_len < sizeof(SHA1digest)) { + return LUTIL_PASSWD_ERR; + } + + /* base64 un-encode password */ + orig_pass = (unsigned char *) ber_memalloc(decode_len + 1); + + if( orig_pass == NULL ) return LUTIL_PASSWD_ERR; + + rc = lutil_b64_pton(passwd->bv_val, orig_pass, decode_len); + + if( rc != sizeof(SHA1digest) ) { + ber_memfree(orig_pass); + return LUTIL_PASSWD_ERR; + } + + /* hash credentials with salt */ + lutil_SHA1Init(&SHA1context); + lutil_SHA1Update(&SHA1context, + (const unsigned char *) cred->bv_val, cred->bv_len); + lutil_SHA1Final(SHA1digest, &SHA1context); + + /* compare */ + rc = memcmp((char *)orig_pass, (char *)SHA1digest, sizeof(SHA1digest)); + ber_memfree(orig_pass); + return rc ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK; +} +#endif + +static int chk_smd5( + const struct berval *sc, + const struct berval * passwd, + const struct berval * cred, + const char **text ) +{ + lutil_MD5_CTX MD5context; + unsigned char MD5digest[LUTIL_MD5_BYTES]; + int rc; + unsigned char *orig_pass = NULL; + size_t decode_len = LUTIL_BASE64_DECODE_LEN(passwd->bv_len); + + /* safety check */ + if (decode_len <= sizeof(MD5digest)) { + return LUTIL_PASSWD_ERR; + } + + /* base64 un-encode password */ + orig_pass = (unsigned char *) ber_memalloc(decode_len + 1); + + if( orig_pass == NULL ) return LUTIL_PASSWD_ERR; + + rc = lutil_b64_pton(passwd->bv_val, orig_pass, decode_len); + + if (rc <= (int)(sizeof(MD5digest))) { + ber_memfree(orig_pass); + return LUTIL_PASSWD_ERR; + } + + /* hash credentials with salt */ + lutil_MD5Init(&MD5context); + lutil_MD5Update(&MD5context, + (const unsigned char *) cred->bv_val, + cred->bv_len ); + lutil_MD5Update(&MD5context, + &orig_pass[sizeof(MD5digest)], + rc - sizeof(MD5digest)); + lutil_MD5Final(MD5digest, &MD5context); + + /* compare */ + rc = memcmp((char *)orig_pass, (char *)MD5digest, sizeof(MD5digest)); + ber_memfree(orig_pass); + return rc ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK; +} + +static int chk_md5( + const struct berval *sc, + const struct berval * passwd, + const struct berval * cred, + const char **text ) +{ + lutil_MD5_CTX MD5context; + unsigned char MD5digest[LUTIL_MD5_BYTES]; + int rc; + unsigned char *orig_pass = NULL; + size_t decode_len = LUTIL_BASE64_DECODE_LEN(passwd->bv_len); + + /* safety check */ + if (decode_len < sizeof(MD5digest)) { + return LUTIL_PASSWD_ERR; + } + + /* base64 un-encode password */ + orig_pass = (unsigned char *) ber_memalloc(decode_len + 1); + + if( orig_pass == NULL ) return LUTIL_PASSWD_ERR; + + rc = lutil_b64_pton(passwd->bv_val, orig_pass, decode_len); + if ( rc != sizeof(MD5digest) ) { + ber_memfree(orig_pass); + return LUTIL_PASSWD_ERR; + } + + /* hash credentials with salt */ + lutil_MD5Init(&MD5context); + lutil_MD5Update(&MD5context, + (const unsigned char *) cred->bv_val, + cred->bv_len ); + lutil_MD5Final(MD5digest, &MD5context); + + /* compare */ + rc = memcmp((char *)orig_pass, (char *)MD5digest, sizeof(MD5digest)); + ber_memfree(orig_pass); + return rc ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK; +} + +#ifdef SLAPD_CRYPT +static int lutil_crypt( + const char *key, + const char *salt, + char **hash ) +{ + char *cr = crypt( key, salt ); + int rc; + + if( cr == NULL || cr[0] == '\0' ) { + /* salt must have been invalid */ + rc = LUTIL_PASSWD_ERR; + } else { + if ( hash ) { + *hash = ber_strdup( cr ); + rc = LUTIL_PASSWD_OK; + } else { + rc = strcmp( salt, cr ) ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK; + } + } + return rc; +} + +static int chk_crypt( + const struct berval *sc, + const struct berval * passwd, + const struct berval * cred, + const char **text ) +{ + unsigned int i; + + for( i=0; i<cred->bv_len; i++) { + if(cred->bv_val[i] == '\0') { + return LUTIL_PASSWD_ERR; /* NUL character in password */ + } + } + + if( cred->bv_val[i] != '\0' ) { + return LUTIL_PASSWD_ERR; /* cred must behave like a string */ + } + + if( passwd->bv_len < 2 ) { + return LUTIL_PASSWD_ERR; /* passwd must be at least two characters long */ + } + + for( i=0; i<passwd->bv_len; i++) { + if(passwd->bv_val[i] == '\0') { + return LUTIL_PASSWD_ERR; /* NUL character in password */ + } + } + + if( passwd->bv_val[i] != '\0' ) { + return LUTIL_PASSWD_ERR; /* passwd must behave like a string */ + } + + return lutil_cryptptr( cred->bv_val, passwd->bv_val, NULL ); +} + +# if defined( HAVE_GETPWNAM ) && defined( HAVE_STRUCT_PASSWD_PW_PASSWD ) +static int chk_unix( + const struct berval *sc, + const struct berval * passwd, + const struct berval * cred, + const char **text ) +{ + unsigned int i; + char *pw; + + for( i=0; i<cred->bv_len; i++) { + if(cred->bv_val[i] == '\0') { + return LUTIL_PASSWD_ERR; /* NUL character in password */ + } + } + if( cred->bv_val[i] != '\0' ) { + return LUTIL_PASSWD_ERR; /* cred must behave like a string */ + } + + for( i=0; i<passwd->bv_len; i++) { + if(passwd->bv_val[i] == '\0') { + return LUTIL_PASSWD_ERR; /* NUL character in password */ + } + } + + if( passwd->bv_val[i] != '\0' ) { + return LUTIL_PASSWD_ERR; /* passwd must behave like a string */ + } + + { + struct passwd *pwd = getpwnam(passwd->bv_val); + + if(pwd == NULL) { + return LUTIL_PASSWD_ERR; /* not found */ + } + + pw = pwd->pw_passwd; + } +# ifdef HAVE_GETSPNAM + { + struct spwd *spwd = getspnam(passwd->bv_val); + + if(spwd != NULL) { + pw = spwd->sp_pwdp; + } + } +# endif +# ifdef HAVE_AIX_SECURITY + { + struct userpw *upw = getuserpw(passwd->bv_val); + + if (upw != NULL) { + pw = upw->upw_passwd; + } + } +# endif + + if( pw == NULL || pw[0] == '\0' || pw[1] == '\0' ) { + /* password must must be at least two characters long */ + return LUTIL_PASSWD_ERR; + } + + return lutil_cryptptr( cred->bv_val, pw, NULL ); +} +# endif +#endif + +/* PASSWORD GENERATION ROUTINES */ + +#ifdef LUTIL_SHA1_BYTES +static int hash_ssha1( + const struct berval *scheme, + const struct berval *passwd, + struct berval *hash, + const char **text ) +{ + lutil_SHA1_CTX SHA1context; + unsigned char SHA1digest[LUTIL_SHA1_BYTES]; + char saltdata[SALT_SIZE]; + struct berval digest; + struct berval salt; + + digest.bv_val = (char *) SHA1digest; + digest.bv_len = sizeof(SHA1digest); + salt.bv_val = saltdata; + salt.bv_len = sizeof(saltdata); + + if( lutil_entropy( (unsigned char *) salt.bv_val, salt.bv_len) < 0 ) { + return LUTIL_PASSWD_ERR; + } + + lutil_SHA1Init( &SHA1context ); + lutil_SHA1Update( &SHA1context, + (const unsigned char *)passwd->bv_val, passwd->bv_len ); + lutil_SHA1Update( &SHA1context, + (const unsigned char *)salt.bv_val, salt.bv_len ); + lutil_SHA1Final( SHA1digest, &SHA1context ); + + return lutil_passwd_string64( scheme, &digest, hash, &salt); +} + +static int hash_sha1( + const struct berval *scheme, + const struct berval *passwd, + struct berval *hash, + const char **text ) +{ + lutil_SHA1_CTX SHA1context; + unsigned char SHA1digest[LUTIL_SHA1_BYTES]; + struct berval digest; + digest.bv_val = (char *) SHA1digest; + digest.bv_len = sizeof(SHA1digest); + + lutil_SHA1Init( &SHA1context ); + lutil_SHA1Update( &SHA1context, + (const unsigned char *)passwd->bv_val, passwd->bv_len ); + lutil_SHA1Final( SHA1digest, &SHA1context ); + + return lutil_passwd_string64( scheme, &digest, hash, NULL); +} +#endif + +static int hash_smd5( + const struct berval *scheme, + const struct berval *passwd, + struct berval *hash, + const char **text ) +{ + lutil_MD5_CTX MD5context; + unsigned char MD5digest[LUTIL_MD5_BYTES]; + char saltdata[SALT_SIZE]; + struct berval digest; + struct berval salt; + + digest.bv_val = (char *) MD5digest; + digest.bv_len = sizeof(MD5digest); + salt.bv_val = saltdata; + salt.bv_len = sizeof(saltdata); + + if( lutil_entropy( (unsigned char *) salt.bv_val, salt.bv_len) < 0 ) { + return LUTIL_PASSWD_ERR; + } + + lutil_MD5Init( &MD5context ); + lutil_MD5Update( &MD5context, + (const unsigned char *) passwd->bv_val, passwd->bv_len ); + lutil_MD5Update( &MD5context, + (const unsigned char *) salt.bv_val, salt.bv_len ); + lutil_MD5Final( MD5digest, &MD5context ); + + return lutil_passwd_string64( scheme, &digest, hash, &salt ); +} + +static int hash_md5( + const struct berval *scheme, + const struct berval *passwd, + struct berval *hash, + const char **text ) +{ + lutil_MD5_CTX MD5context; + unsigned char MD5digest[LUTIL_MD5_BYTES]; + + struct berval digest; + + digest.bv_val = (char *) MD5digest; + digest.bv_len = sizeof(MD5digest); + + lutil_MD5Init( &MD5context ); + lutil_MD5Update( &MD5context, + (const unsigned char *) passwd->bv_val, passwd->bv_len ); + lutil_MD5Final( MD5digest, &MD5context ); + + return lutil_passwd_string64( scheme, &digest, hash, NULL ); +; +} + +#ifdef SLAPD_CRYPT +static int hash_crypt( + const struct berval *scheme, + const struct berval *passwd, + struct berval *hash, + const char **text ) +{ + unsigned char salt[32]; /* salt suitable for most anything */ + unsigned int i; + char *save; + int rc; + + for( i=0; i<passwd->bv_len; i++) { + if(passwd->bv_val[i] == '\0') { + return LUTIL_PASSWD_ERR; /* NUL character in password */ + } + } + + if( passwd->bv_val[i] != '\0' ) { + return LUTIL_PASSWD_ERR; /* passwd must behave like a string */ + } + + if( lutil_entropy( salt, sizeof( salt ) ) < 0 ) { + return LUTIL_PASSWD_ERR; + } + + for( i=0; i< ( sizeof(salt) - 1 ); i++ ) { + salt[i] = crypt64[ salt[i] % (sizeof(crypt64)-1) ]; + } + salt[sizeof( salt ) - 1 ] = '\0'; + + if( salt_format != NULL ) { + /* copy the salt we made into entropy before snprintfing + it back into the salt */ + char entropy[sizeof(salt)]; + strcpy( entropy, (char *) salt ); + snprintf( (char *) salt, sizeof(entropy), salt_format, entropy ); + } + + rc = lutil_cryptptr( passwd->bv_val, (char *) salt, &hash->bv_val ); + if ( rc != LUTIL_PASSWD_OK ) return rc; + + if( hash->bv_val == NULL ) return -1; + + hash->bv_len = strlen( hash->bv_val ); + + save = hash->bv_val; + + if( hash->bv_len == 0 ) { + rc = LUTIL_PASSWD_ERR; + } else { + rc = pw_string( scheme, hash ); + } + ber_memfree( save ); + return rc; +} +#endif + +int lutil_salt_format(const char *format) +{ +#ifdef SLAPD_CRYPT + ber_memfree( salt_format ); + + salt_format = format != NULL ? ber_strdup( format ) : NULL; +#endif + + return 0; +} + +#ifdef SLAPD_CLEARTEXT +static int hash_clear( + const struct berval *scheme, + const struct berval *passwd, + struct berval *hash, + const char **text ) +{ + ber_dupbv( hash, (struct berval *)passwd ); + return LUTIL_PASSWD_OK; +} +#endif + |