diff options
Diffstat (limited to 'crypto/proc.c')
| -rw-r--r-- | crypto/proc.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/crypto/proc.c b/crypto/proc.c new file mode 100644 index 00000000..58fef67d --- /dev/null +++ b/crypto/proc.c @@ -0,0 +1,154 @@ +/* + * Scatterlist Cryptographic API. + * + * Procfs information. + * + * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> + * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + * + */ + +#include <asm/atomic.h> +#include <linux/init.h> +#include <linux/crypto.h> +#include <linux/rwsem.h> +#include <linux/proc_fs.h> +#include <linux/seq_file.h> +#include <linux/sysctl.h> +#include "internal.h" + +#ifdef CONFIG_CRYPTO_FIPS +static struct ctl_table crypto_sysctl_table[] = { + { + .procname = "fips_enabled", + .data = &fips_enabled, + .maxlen = sizeof(int), + .mode = 0444, + .proc_handler = proc_dointvec + }, + {} +}; + +static struct ctl_table crypto_dir_table[] = { + { + .procname = "crypto", + .mode = 0555, + .child = crypto_sysctl_table + }, + {} +}; + +static struct ctl_table_header *crypto_sysctls; + +static void crypto_proc_fips_init(void) +{ + crypto_sysctls = register_sysctl_table(crypto_dir_table); +} + +static void crypto_proc_fips_exit(void) +{ + if (crypto_sysctls) + unregister_sysctl_table(crypto_sysctls); +} +#else +#define crypto_proc_fips_init() +#define crypto_proc_fips_exit() +#endif + +static void *c_start(struct seq_file *m, loff_t *pos) +{ + down_read(&crypto_alg_sem); + return seq_list_start(&crypto_alg_list, *pos); +} + +static void *c_next(struct seq_file *m, void *p, loff_t *pos) +{ + return seq_list_next(p, &crypto_alg_list, pos); +} + +static void c_stop(struct seq_file *m, void *p) +{ + up_read(&crypto_alg_sem); +} + +static int c_show(struct seq_file *m, void *p) +{ + struct crypto_alg *alg = list_entry(p, struct crypto_alg, cra_list); + + seq_printf(m, "name : %s\n", alg->cra_name); + seq_printf(m, "driver : %s\n", alg->cra_driver_name); + seq_printf(m, "module : %s\n", module_name(alg->cra_module)); + seq_printf(m, "priority : %d\n", alg->cra_priority); + seq_printf(m, "refcnt : %d\n", atomic_read(&alg->cra_refcnt)); + seq_printf(m, "selftest : %s\n", + (alg->cra_flags & CRYPTO_ALG_TESTED) ? + "passed" : "unknown"); + + if (alg->cra_flags & CRYPTO_ALG_LARVAL) { + seq_printf(m, "type : larval\n"); + seq_printf(m, "flags : 0x%x\n", alg->cra_flags); + goto out; + } + + if (alg->cra_type && alg->cra_type->show) { + alg->cra_type->show(m, alg); + goto out; + } + + switch (alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL)) { + case CRYPTO_ALG_TYPE_CIPHER: + seq_printf(m, "type : cipher\n"); + seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); + seq_printf(m, "min keysize : %u\n", + alg->cra_cipher.cia_min_keysize); + seq_printf(m, "max keysize : %u\n", + alg->cra_cipher.cia_max_keysize); + break; + case CRYPTO_ALG_TYPE_COMPRESS: + seq_printf(m, "type : compression\n"); + break; + default: + seq_printf(m, "type : unknown\n"); + break; + } + +out: + seq_putc(m, '\n'); + return 0; +} + +static const struct seq_operations crypto_seq_ops = { + .start = c_start, + .next = c_next, + .stop = c_stop, + .show = c_show +}; + +static int crypto_info_open(struct inode *inode, struct file *file) +{ + return seq_open(file, &crypto_seq_ops); +} + +static const struct file_operations proc_crypto_ops = { + .open = crypto_info_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release +}; + +void __init crypto_init_proc(void) +{ + proc_create("crypto", 0, NULL, &proc_crypto_ops); + crypto_proc_fips_init(); +} + +void __exit crypto_exit_proc(void) +{ + crypto_proc_fips_exit(); + remove_proc_entry("crypto", NULL); +} |