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Annotation of embedaddon/nginx/src/os/unix/ngx_user.c, revision 1.1

1.1     ! misho       1: 
        !             2: /*
        !             3:  * Copyright (C) Igor Sysoev
        !             4:  * Copyright (C) Nginx, Inc.
        !             5:  */
        !             6: 
        !             7: 
        !             8: #include <ngx_config.h>
        !             9: #include <ngx_core.h>
        !            10: 
        !            11: 
        !            12: /*
        !            13:  * Solaris has thread-safe crypt()
        !            14:  * Linux has crypt_r(); "struct crypt_data" is more than 128K
        !            15:  * FreeBSD needs the mutex to protect crypt()
        !            16:  *
        !            17:  * TODO:
        !            18:  *     ngx_crypt_init() to init mutex
        !            19:  */
        !            20: 
        !            21: 
        !            22: #if (NGX_CRYPT)
        !            23: 
        !            24: #if (NGX_HAVE_GNU_CRYPT_R)
        !            25: 
        !            26: ngx_int_t
        !            27: ngx_libc_crypt(ngx_pool_t *pool, u_char *key, u_char *salt, u_char **encrypted)
        !            28: {
        !            29:     char               *value;
        !            30:     size_t              len;
        !            31:     struct crypt_data   cd;
        !            32: 
        !            33:     cd.initialized = 0;
        !            34:     /* work around the glibc bug */
        !            35:     cd.current_salt[0] = ~salt[0];
        !            36: 
        !            37:     value = crypt_r((char *) key, (char *) salt, &cd);
        !            38: 
        !            39:     if (value) {
        !            40:         len = ngx_strlen(value) + 1;
        !            41: 
        !            42:         *encrypted = ngx_pnalloc(pool, len);
        !            43:         if (*encrypted == NULL) {
        !            44:             return NGX_ERROR;
        !            45:         }
        !            46: 
        !            47:         ngx_memcpy(*encrypted, value, len);
        !            48:         return NGX_OK;
        !            49:     }
        !            50: 
        !            51:     ngx_log_error(NGX_LOG_CRIT, pool->log, ngx_errno, "crypt_r() failed");
        !            52: 
        !            53:     return NGX_ERROR;
        !            54: }
        !            55: 
        !            56: #else
        !            57: 
        !            58: ngx_int_t
        !            59: ngx_libc_crypt(ngx_pool_t *pool, u_char *key, u_char *salt, u_char **encrypted)
        !            60: {
        !            61:     char       *value;
        !            62:     size_t      len;
        !            63:     ngx_err_t   err;
        !            64: 
        !            65: #if (NGX_THREADS && NGX_NONREENTRANT_CRYPT)
        !            66: 
        !            67:     /* crypt() is a time consuming function, so we only try to lock */
        !            68: 
        !            69:     if (ngx_mutex_trylock(ngx_crypt_mutex) != NGX_OK) {
        !            70:         return NGX_AGAIN;
        !            71:     }
        !            72: 
        !            73: #endif
        !            74: 
        !            75:     value = crypt((char *) key, (char *) salt);
        !            76: 
        !            77:     if (value) {
        !            78:         len = ngx_strlen(value) + 1;
        !            79: 
        !            80:         *encrypted = ngx_pnalloc(pool, len);
        !            81:         if (*encrypted == NULL) {
        !            82: #if (NGX_THREADS && NGX_NONREENTRANT_CRYPT)
        !            83:             ngx_mutex_unlock(ngx_crypt_mutex);
        !            84: #endif
        !            85:             return NGX_ERROR;
        !            86:         }
        !            87: 
        !            88:         ngx_memcpy(*encrypted, value, len);
        !            89: #if (NGX_THREADS && NGX_NONREENTRANT_CRYPT)
        !            90:         ngx_mutex_unlock(ngx_crypt_mutex);
        !            91: #endif
        !            92:         return NGX_OK;
        !            93:     }
        !            94: 
        !            95:     err = ngx_errno;
        !            96: 
        !            97: #if (NGX_THREADS && NGX_NONREENTRANT_CRYPT)
        !            98:     ngx_mutex_unlock(ngx_crypt_mutex);
        !            99: #endif
        !           100: 
        !           101:     ngx_log_error(NGX_LOG_CRIT, pool->log, err, "crypt() failed");
        !           102: 
        !           103:     return NGX_ERROR;
        !           104: }
        !           105: 
        !           106: #endif
        !           107: 
        !           108: #endif /* NGX_CRYPT */