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https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-23 12:14:10 +08:00
KEYS: asymmetric: Use new crypto interface without scatterlists
Use the new akcipher and sig interfaces which no longer have scatterlists in them. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu
parent
e5221fa6a3
commit
63ba4d6759
@ -8,16 +8,17 @@
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*/
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#define pr_fmt(fmt) "PKEY: "fmt
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#include <linux/module.h>
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#include <linux/export.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/seq_file.h>
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#include <linux/scatterlist.h>
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#include <linux/asn1.h>
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#include <keys/asymmetric-subtype.h>
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#include <crypto/public_key.h>
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#include <crypto/akcipher.h>
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#include <crypto/public_key.h>
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#include <crypto/sig.h>
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#include <keys/asymmetric-subtype.h>
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#include <linux/asn1.h>
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#include <linux/err.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/seq_file.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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MODULE_DESCRIPTION("In-software asymmetric public-key subtype");
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MODULE_AUTHOR("Red Hat, Inc.");
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@ -65,10 +66,13 @@ static void public_key_destroy(void *payload0, void *payload3)
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static int
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software_key_determine_akcipher(const struct public_key *pkey,
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const char *encoding, const char *hash_algo,
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char alg_name[CRYPTO_MAX_ALG_NAME])
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char alg_name[CRYPTO_MAX_ALG_NAME], bool *sig,
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enum kernel_pkey_operation op)
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{
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int n;
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*sig = true;
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if (!encoding)
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return -EINVAL;
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@ -77,14 +81,18 @@ software_key_determine_akcipher(const struct public_key *pkey,
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* RSA signatures usually use EMSA-PKCS1-1_5 [RFC3447 sec 8.2].
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*/
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if (strcmp(encoding, "pkcs1") == 0) {
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if (!hash_algo)
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if (!hash_algo) {
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*sig = false;
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n = snprintf(alg_name, CRYPTO_MAX_ALG_NAME,
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"pkcs1pad(%s)",
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pkey->pkey_algo);
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else
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} else {
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*sig = op == kernel_pkey_sign ||
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op == kernel_pkey_verify;
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n = snprintf(alg_name, CRYPTO_MAX_ALG_NAME,
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"pkcs1pad(%s,%s)",
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pkey->pkey_algo, hash_algo);
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}
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return n >= CRYPTO_MAX_ALG_NAME ? -EINVAL : 0;
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}
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if (strcmp(encoding, "raw") != 0)
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@ -95,6 +103,7 @@ software_key_determine_akcipher(const struct public_key *pkey,
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*/
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if (hash_algo)
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return -EINVAL;
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*sig = false;
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} else if (strncmp(pkey->pkey_algo, "ecdsa", 5) == 0) {
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if (strcmp(encoding, "x962") != 0)
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return -EINVAL;
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@ -152,37 +161,70 @@ static int software_key_query(const struct kernel_pkey_params *params,
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struct crypto_akcipher *tfm;
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struct public_key *pkey = params->key->payload.data[asym_crypto];
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char alg_name[CRYPTO_MAX_ALG_NAME];
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struct crypto_sig *sig;
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u8 *key, *ptr;
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int ret, len;
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bool issig;
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ret = software_key_determine_akcipher(pkey, params->encoding,
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params->hash_algo, alg_name);
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params->hash_algo, alg_name,
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&issig, kernel_pkey_sign);
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if (ret < 0)
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return ret;
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tfm = crypto_alloc_akcipher(alg_name, 0, 0);
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if (IS_ERR(tfm))
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return PTR_ERR(tfm);
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ret = -ENOMEM;
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key = kmalloc(pkey->keylen + sizeof(u32) * 2 + pkey->paramlen,
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GFP_KERNEL);
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if (!key)
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goto error_free_tfm;
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return -ENOMEM;
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memcpy(key, pkey->key, pkey->keylen);
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ptr = key + pkey->keylen;
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ptr = pkey_pack_u32(ptr, pkey->algo);
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ptr = pkey_pack_u32(ptr, pkey->paramlen);
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memcpy(ptr, pkey->params, pkey->paramlen);
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if (pkey->key_is_private)
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ret = crypto_akcipher_set_priv_key(tfm, key, pkey->keylen);
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else
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ret = crypto_akcipher_set_pub_key(tfm, key, pkey->keylen);
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if (ret < 0)
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goto error_free_key;
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if (issig) {
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sig = crypto_alloc_sig(alg_name, 0, 0);
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if (IS_ERR(sig))
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goto error_free_key;
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if (pkey->key_is_private)
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ret = crypto_sig_set_privkey(sig, key, pkey->keylen);
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else
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ret = crypto_sig_set_pubkey(sig, key, pkey->keylen);
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if (ret < 0)
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goto error_free_tfm;
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len = crypto_sig_maxsize(sig);
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info->supported_ops = KEYCTL_SUPPORTS_VERIFY;
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if (pkey->key_is_private)
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info->supported_ops |= KEYCTL_SUPPORTS_SIGN;
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if (strcmp(params->encoding, "pkcs1") == 0) {
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info->supported_ops |= KEYCTL_SUPPORTS_ENCRYPT;
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if (pkey->key_is_private)
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info->supported_ops |= KEYCTL_SUPPORTS_DECRYPT;
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}
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} else {
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tfm = crypto_alloc_akcipher(alg_name, 0, 0);
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if (IS_ERR(tfm))
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goto error_free_key;
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if (pkey->key_is_private)
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ret = crypto_akcipher_set_priv_key(tfm, key, pkey->keylen);
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else
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ret = crypto_akcipher_set_pub_key(tfm, key, pkey->keylen);
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if (ret < 0)
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goto error_free_tfm;
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len = crypto_akcipher_maxsize(tfm);
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info->supported_ops = KEYCTL_SUPPORTS_ENCRYPT;
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if (pkey->key_is_private)
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info->supported_ops |= KEYCTL_SUPPORTS_DECRYPT;
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}
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len = crypto_akcipher_maxsize(tfm);
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info->key_size = len * 8;
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if (strncmp(pkey->pkey_algo, "ecdsa", 5) == 0) {
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@ -208,17 +250,16 @@ static int software_key_query(const struct kernel_pkey_params *params,
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info->max_enc_size = len;
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info->max_dec_size = len;
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info->supported_ops = (KEYCTL_SUPPORTS_ENCRYPT |
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KEYCTL_SUPPORTS_VERIFY);
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if (pkey->key_is_private)
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info->supported_ops |= (KEYCTL_SUPPORTS_DECRYPT |
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KEYCTL_SUPPORTS_SIGN);
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ret = 0;
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error_free_tfm:
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if (issig)
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crypto_free_sig(sig);
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else
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crypto_free_akcipher(tfm);
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error_free_key:
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kfree(key);
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error_free_tfm:
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crypto_free_akcipher(tfm);
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pr_devel("<==%s() = %d\n", __func__, ret);
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return ret;
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}
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@ -230,34 +271,26 @@ static int software_key_eds_op(struct kernel_pkey_params *params,
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const void *in, void *out)
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{
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const struct public_key *pkey = params->key->payload.data[asym_crypto];
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struct akcipher_request *req;
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struct crypto_akcipher *tfm;
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struct crypto_wait cwait;
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struct scatterlist in_sg, out_sg;
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char alg_name[CRYPTO_MAX_ALG_NAME];
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struct crypto_akcipher *tfm;
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struct crypto_sig *sig;
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char *key, *ptr;
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bool issig;
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int ksz;
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int ret;
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pr_devel("==>%s()\n", __func__);
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ret = software_key_determine_akcipher(pkey, params->encoding,
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params->hash_algo, alg_name);
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params->hash_algo, alg_name,
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&issig, params->op);
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if (ret < 0)
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return ret;
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tfm = crypto_alloc_akcipher(alg_name, 0, 0);
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if (IS_ERR(tfm))
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return PTR_ERR(tfm);
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ret = -ENOMEM;
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req = akcipher_request_alloc(tfm, GFP_KERNEL);
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if (!req)
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goto error_free_tfm;
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key = kmalloc(pkey->keylen + sizeof(u32) * 2 + pkey->paramlen,
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GFP_KERNEL);
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if (!key)
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goto error_free_req;
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return -ENOMEM;
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memcpy(key, pkey->key, pkey->keylen);
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ptr = key + pkey->keylen;
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@ -265,47 +298,70 @@ static int software_key_eds_op(struct kernel_pkey_params *params,
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ptr = pkey_pack_u32(ptr, pkey->paramlen);
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memcpy(ptr, pkey->params, pkey->paramlen);
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if (pkey->key_is_private)
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ret = crypto_akcipher_set_priv_key(tfm, key, pkey->keylen);
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else
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ret = crypto_akcipher_set_pub_key(tfm, key, pkey->keylen);
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if (ret)
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goto error_free_key;
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if (issig) {
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sig = crypto_alloc_sig(alg_name, 0, 0);
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if (IS_ERR(sig))
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goto error_free_key;
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sg_init_one(&in_sg, in, params->in_len);
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sg_init_one(&out_sg, out, params->out_len);
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akcipher_request_set_crypt(req, &in_sg, &out_sg, params->in_len,
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params->out_len);
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crypto_init_wait(&cwait);
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akcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG |
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CRYPTO_TFM_REQ_MAY_SLEEP,
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crypto_req_done, &cwait);
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if (pkey->key_is_private)
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ret = crypto_sig_set_privkey(sig, key, pkey->keylen);
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else
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ret = crypto_sig_set_pubkey(sig, key, pkey->keylen);
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if (ret)
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goto error_free_tfm;
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ksz = crypto_sig_maxsize(sig);
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} else {
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tfm = crypto_alloc_akcipher(alg_name, 0, 0);
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if (IS_ERR(tfm))
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goto error_free_key;
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if (pkey->key_is_private)
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ret = crypto_akcipher_set_priv_key(tfm, key, pkey->keylen);
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else
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ret = crypto_akcipher_set_pub_key(tfm, key, pkey->keylen);
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if (ret)
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goto error_free_tfm;
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ksz = crypto_akcipher_maxsize(tfm);
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}
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ret = -EINVAL;
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/* Perform the encryption calculation. */
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switch (params->op) {
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case kernel_pkey_encrypt:
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ret = crypto_akcipher_encrypt(req);
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if (issig)
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break;
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ret = crypto_akcipher_sync_encrypt(tfm, in, params->in_len,
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out, params->out_len);
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break;
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case kernel_pkey_decrypt:
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ret = crypto_akcipher_decrypt(req);
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if (issig)
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break;
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ret = crypto_akcipher_sync_decrypt(tfm, in, params->in_len,
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out, params->out_len);
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break;
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case kernel_pkey_sign:
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ret = crypto_akcipher_sign(req);
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if (!issig)
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break;
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ret = crypto_sig_sign(sig, in, params->in_len,
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out, params->out_len);
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break;
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default:
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BUG();
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}
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ret = crypto_wait_req(ret, &cwait);
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if (ret == 0)
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ret = req->dst_len;
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ret = ksz;
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error_free_tfm:
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if (issig)
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crypto_free_sig(sig);
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else
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crypto_free_akcipher(tfm);
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error_free_key:
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kfree(key);
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error_free_req:
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akcipher_request_free(req);
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error_free_tfm:
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crypto_free_akcipher(tfm);
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pr_devel("<==%s() = %d\n", __func__, ret);
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return ret;
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}
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@ -316,12 +372,10 @@ error_free_tfm:
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int public_key_verify_signature(const struct public_key *pkey,
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const struct public_key_signature *sig)
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{
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struct crypto_wait cwait;
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struct crypto_akcipher *tfm;
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struct akcipher_request *req;
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struct scatterlist src_sg[2];
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char alg_name[CRYPTO_MAX_ALG_NAME];
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struct crypto_sig *tfm;
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char *key, *ptr;
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bool issig;
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int ret;
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pr_devel("==>%s()\n", __func__);
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@ -346,23 +400,19 @@ int public_key_verify_signature(const struct public_key *pkey,
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}
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ret = software_key_determine_akcipher(pkey, sig->encoding,
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sig->hash_algo, alg_name);
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sig->hash_algo, alg_name,
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&issig, kernel_pkey_verify);
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if (ret < 0)
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return ret;
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tfm = crypto_alloc_akcipher(alg_name, 0, 0);
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tfm = crypto_alloc_sig(alg_name, 0, 0);
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if (IS_ERR(tfm))
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return PTR_ERR(tfm);
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ret = -ENOMEM;
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req = akcipher_request_alloc(tfm, GFP_KERNEL);
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if (!req)
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goto error_free_tfm;
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key = kmalloc(pkey->keylen + sizeof(u32) * 2 + pkey->paramlen,
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GFP_KERNEL);
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if (!key)
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goto error_free_req;
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goto error_free_tfm;
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memcpy(key, pkey->key, pkey->keylen);
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ptr = key + pkey->keylen;
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@ -371,29 +421,19 @@ int public_key_verify_signature(const struct public_key *pkey,
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memcpy(ptr, pkey->params, pkey->paramlen);
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if (pkey->key_is_private)
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ret = crypto_akcipher_set_priv_key(tfm, key, pkey->keylen);
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ret = crypto_sig_set_privkey(tfm, key, pkey->keylen);
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else
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ret = crypto_akcipher_set_pub_key(tfm, key, pkey->keylen);
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ret = crypto_sig_set_pubkey(tfm, key, pkey->keylen);
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if (ret)
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goto error_free_key;
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sg_init_table(src_sg, 2);
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sg_set_buf(&src_sg[0], sig->s, sig->s_size);
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sg_set_buf(&src_sg[1], sig->digest, sig->digest_size);
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akcipher_request_set_crypt(req, src_sg, NULL, sig->s_size,
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sig->digest_size);
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crypto_init_wait(&cwait);
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akcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG |
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CRYPTO_TFM_REQ_MAY_SLEEP,
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crypto_req_done, &cwait);
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ret = crypto_wait_req(crypto_akcipher_verify(req), &cwait);
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ret = crypto_sig_verify(tfm, sig->s, sig->s_size,
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sig->digest, sig->digest_size);
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error_free_key:
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kfree(key);
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error_free_req:
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akcipher_request_free(req);
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error_free_tfm:
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crypto_free_akcipher(tfm);
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crypto_free_sig(tfm);
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pr_devel("<==%s() = %d\n", __func__, ret);
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if (WARN_ON_ONCE(ret > 0))
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ret = -EINVAL;
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