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crypto: Add return value to DES and AES encrypt/decrypt

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These operations may fail with some crypto wrappers, so allow the
functions to report their results to the caller.

Signed-off-by: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2017-02-28 10:57:43 +02:00
parent dca4b503f1
commit 5f0e165e80
9 changed files with 38 additions and 21 deletions
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4
src/crypto/aes-internal-dec.c
View file

@ -147,10 +147,12 @@ d##3 = TD0(s##3) ^ TD1(s##2) ^ TD2(s##1) ^ TD3(s##0) ^ rk[4 * i + 3]
PUTU32(pt + 12, s3); PUTU32(pt + 12, s3);
} }
void aes_decrypt(void *ctx, const u8 *crypt, u8 *plain)
int aes_decrypt(void *ctx, const u8 *crypt, u8 *plain)
{ {
u32 *rk = ctx; u32 *rk = ctx;
rijndaelDecrypt(ctx, rk[AES_PRIV_NR_POS], crypt, plain); rijndaelDecrypt(ctx, rk[AES_PRIV_NR_POS], crypt, plain);
return 0;
} }

3
src/crypto/aes-internal-enc.c
View file

@ -112,10 +112,11 @@ void * aes_encrypt_init(const u8 *key, size_t len)
} }
void aes_encrypt(void *ctx, const u8 *plain, u8 *crypt) int aes_encrypt(void *ctx, const u8 *plain, u8 *crypt)
{ {
u32 *rk = ctx; u32 *rk = ctx;
rijndaelEncrypt(ctx, rk[AES_PRIV_NR_POS], plain, crypt); rijndaelEncrypt(ctx, rk[AES_PRIV_NR_POS], plain, crypt);
return 0;
} }

4
src/crypto/aes.h
View file

@ -12,10 +12,10 @@
#define AES_BLOCK_SIZE 16 #define AES_BLOCK_SIZE 16
void * aes_encrypt_init(const u8 *key, size_t len); void * aes_encrypt_init(const u8 *key, size_t len);
void aes_encrypt(void *ctx, const u8 *plain, u8 *crypt); int aes_encrypt(void *ctx, const u8 *plain, u8 *crypt);
void aes_encrypt_deinit(void *ctx); void aes_encrypt_deinit(void *ctx);
void * aes_decrypt_init(const u8 *key, size_t len); void * aes_decrypt_init(const u8 *key, size_t len);
void aes_decrypt(void *ctx, const u8 *crypt, u8 *plain); int aes_decrypt(void *ctx, const u8 *crypt, u8 *plain);
void aes_decrypt_deinit(void *ctx); void aes_decrypt_deinit(void *ctx);
#endif /* AES_H */ #endif /* AES_H */

9
src/crypto/crypto.h
View file

@ -106,8 +106,9 @@ int sha512_vector(size_t num_elem, const u8 *addr[], const size_t *len,
* @clear: 8 octets (in) * @clear: 8 octets (in)
* @key: 7 octets (in) (no parity bits included) * @key: 7 octets (in) (no parity bits included)
* @cypher: 8 octets (out) * @cypher: 8 octets (out)
* Returns: 0 on success, -1 on failure
*/ */
void des_encrypt(const u8 *clear, const u8 *key, u8 *cypher); int des_encrypt(const u8 *clear, const u8 *key, u8 *cypher);
/** /**
* aes_encrypt_init - Initialize AES for encryption * aes_encrypt_init - Initialize AES for encryption
@ -122,8 +123,9 @@ void * aes_encrypt_init(const u8 *key, size_t len);
* @ctx: Context pointer from aes_encrypt_init() * @ctx: Context pointer from aes_encrypt_init()
* @plain: Plaintext data to be encrypted (16 bytes) * @plain: Plaintext data to be encrypted (16 bytes)
* @crypt: Buffer for the encrypted data (16 bytes) * @crypt: Buffer for the encrypted data (16 bytes)
* Returns: 0 on success, -1 on failure
*/ */
void aes_encrypt(void *ctx, const u8 *plain, u8 *crypt); int aes_encrypt(void *ctx, const u8 *plain, u8 *crypt);
/** /**
* aes_encrypt_deinit - Deinitialize AES encryption * aes_encrypt_deinit - Deinitialize AES encryption
@ -144,8 +146,9 @@ void * aes_decrypt_init(const u8 *key, size_t len);
* @ctx: Context pointer from aes_encrypt_init() * @ctx: Context pointer from aes_encrypt_init()
* @crypt: Encrypted data (16 bytes) * @crypt: Encrypted data (16 bytes)
* @plain: Buffer for the decrypted data (16 bytes) * @plain: Buffer for the decrypted data (16 bytes)
* Returns: 0 on success, -1 on failure
*/ */
void aes_decrypt(void *ctx, const u8 *crypt, u8 *plain); int aes_decrypt(void *ctx, const u8 *crypt, u8 *plain);
/** /**
* aes_decrypt_deinit - Deinitialize AES decryption * aes_decrypt_deinit - Deinitialize AES decryption

9
src/crypto/crypto_gnutls.c
View file

@ -30,7 +30,7 @@ int md4_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
} }
void des_encrypt(const u8 *clear, const u8 *key, u8 *cypher) int des_encrypt(const u8 *clear, const u8 *key, u8 *cypher)
{ {
gcry_cipher_hd_t hd; gcry_cipher_hd_t hd;
u8 pkey[8], next, tmp; u8 pkey[8], next, tmp;
@ -49,6 +49,7 @@ void des_encrypt(const u8 *clear, const u8 *key, u8 *cypher)
gcry_err_code(gcry_cipher_setkey(hd, pkey, 8)); gcry_err_code(gcry_cipher_setkey(hd, pkey, 8));
gcry_cipher_encrypt(hd, cypher, 8, clear, 8); gcry_cipher_encrypt(hd, cypher, 8, clear, 8);
gcry_cipher_close(hd); gcry_cipher_close(hd);
return 0;
} }
@ -107,10 +108,11 @@ void * aes_encrypt_init(const u8 *key, size_t len)
} }
void aes_encrypt(void *ctx, const u8 *plain, u8 *crypt) int aes_encrypt(void *ctx, const u8 *plain, u8 *crypt)
{ {
gcry_cipher_hd_t hd = ctx; gcry_cipher_hd_t hd = ctx;
gcry_cipher_encrypt(hd, crypt, 16, plain, 16); gcry_cipher_encrypt(hd, crypt, 16, plain, 16);
return 0;
} }
@ -137,10 +139,11 @@ void * aes_decrypt_init(const u8 *key, size_t len)
} }
void aes_decrypt(void *ctx, const u8 *crypt, u8 *plain) int aes_decrypt(void *ctx, const u8 *crypt, u8 *plain)
{ {
gcry_cipher_hd_t hd = ctx; gcry_cipher_hd_t hd = ctx;
gcry_cipher_decrypt(hd, plain, 16, crypt, 16); gcry_cipher_decrypt(hd, plain, 16, crypt, 16);
return 0;
} }

13
src/crypto/crypto_libtomcrypt.c
View file

@ -35,7 +35,7 @@ int md4_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
} }
void des_encrypt(const u8 *clear, const u8 *key, u8 *cypher) int des_encrypt(const u8 *clear, const u8 *key, u8 *cypher)
{ {
u8 pkey[8], next, tmp; u8 pkey[8], next, tmp;
int i; int i;
@ -53,6 +53,7 @@ void des_encrypt(const u8 *clear, const u8 *key, u8 *cypher)
des_setup(pkey, 8, 0, &skey); des_setup(pkey, 8, 0, &skey);
des_ecb_encrypt(clear, cypher, &skey); des_ecb_encrypt(clear, cypher, &skey);
des_done(&skey); des_done(&skey);
return 0;
} }
@ -96,10 +97,10 @@ void * aes_encrypt_init(const u8 *key, size_t len)
} }
void aes_encrypt(void *ctx, const u8 *plain, u8 *crypt) int aes_encrypt(void *ctx, const u8 *plain, u8 *crypt)
{ {
symmetric_key *skey = ctx; symmetric_key *skey = ctx;
aes_ecb_encrypt(plain, crypt, skey); return aes_ecb_encrypt(plain, crypt, skey) == CRYPT_OK ? 0 : -1;
} }
@ -125,10 +126,10 @@ void * aes_decrypt_init(const u8 *key, size_t len)
} }
void aes_decrypt(void *ctx, const u8 *crypt, u8 *plain) int aes_decrypt(void *ctx, const u8 *crypt, u8 *plain)
{ {
symmetric_key *skey = ctx; symmetric_key *skey = ctx;
aes_ecb_encrypt(plain, (u8 *) crypt, skey); return aes_ecb_encrypt(plain, (u8 *) crypt, skey) == CRYPT_OK ? 0 : -1;
} }
@ -297,7 +298,7 @@ struct crypto_cipher {
struct crypto_cipher * crypto_cipher_init(enum crypto_cipher_alg alg, struct crypto_cipher * crypto_cipher_init(enum crypto_cipher_alg alg,
const u8 *iv, const u8 *key, const u8 *iv, const u8 *key,
size_t key_len) size_t key_len)
{ {
struct crypto_cipher *ctx; struct crypto_cipher *ctx;
int idx, res, rc4 = 0; int idx, res, rc4 = 0;

3
src/crypto/crypto_none.c
View file

@ -18,6 +18,7 @@ int md4_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
} }
void des_encrypt(const u8 *clear, const u8 *key, u8 *cypher) int des_encrypt(const u8 *clear, const u8 *key, u8 *cypher)
{ {
return 0;
} }

11
src/crypto/crypto_openssl.c
View file

@ -161,7 +161,7 @@ int md4_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
#endif /* CONFIG_FIPS */ #endif /* CONFIG_FIPS */
void des_encrypt(const u8 *clear, const u8 *key, u8 *cypher) int des_encrypt(const u8 *clear, const u8 *key, u8 *cypher)
{ {
u8 pkey[8], next, tmp; u8 pkey[8], next, tmp;
int i; int i;
@ -179,6 +179,7 @@ void des_encrypt(const u8 *clear, const u8 *key, u8 *cypher)
DES_set_key((DES_cblock *) &pkey, &ks); DES_set_key((DES_cblock *) &pkey, &ks);
DES_ecb_encrypt((DES_cblock *) clear, (DES_cblock *) cypher, &ks, DES_ecb_encrypt((DES_cblock *) clear, (DES_cblock *) cypher, &ks,
DES_ENCRYPT); DES_ENCRYPT);
return 0;
} }
@ -295,14 +296,16 @@ void * aes_encrypt_init(const u8 *key, size_t len)
} }
void aes_encrypt(void *ctx, const u8 *plain, u8 *crypt) int aes_encrypt(void *ctx, const u8 *plain, u8 *crypt)
{ {
EVP_CIPHER_CTX *c = ctx; EVP_CIPHER_CTX *c = ctx;
int clen = 16; int clen = 16;
if (EVP_EncryptUpdate(c, crypt, &clen, plain, 16) != 1) { if (EVP_EncryptUpdate(c, crypt, &clen, plain, 16) != 1) {
wpa_printf(MSG_ERROR, "OpenSSL: EVP_EncryptUpdate failed: %s", wpa_printf(MSG_ERROR, "OpenSSL: EVP_EncryptUpdate failed: %s",
ERR_error_string(ERR_get_error(), NULL)); ERR_error_string(ERR_get_error(), NULL));
return -1;
} }
return 0;
} }
@ -347,14 +350,16 @@ void * aes_decrypt_init(const u8 *key, size_t len)
} }
void aes_decrypt(void *ctx, const u8 *crypt, u8 *plain) int aes_decrypt(void *ctx, const u8 *crypt, u8 *plain)
{ {
EVP_CIPHER_CTX *c = ctx; EVP_CIPHER_CTX *c = ctx;
int plen = 16; int plen = 16;
if (EVP_DecryptUpdate(c, plain, &plen, crypt, 16) != 1) { if (EVP_DecryptUpdate(c, plain, &plen, crypt, 16) != 1) {
wpa_printf(MSG_ERROR, "OpenSSL: EVP_DecryptUpdate failed: %s", wpa_printf(MSG_ERROR, "OpenSSL: EVP_DecryptUpdate failed: %s",
ERR_error_string(ERR_get_error(), NULL)); ERR_error_string(ERR_get_error(), NULL));
return -1;
} }
return 0;
} }

3
src/crypto/des-internal.c
View file

@ -396,7 +396,7 @@ static void desfunc(u32 *block, const u32 *keys)
/* wpa_supplicant/hostapd specific wrapper */ /* wpa_supplicant/hostapd specific wrapper */
void des_encrypt(const u8 *clear, const u8 *key, u8 *cypher) int des_encrypt(const u8 *clear, const u8 *key, u8 *cypher)
{ {
u8 pkey[8], next, tmp; u8 pkey[8], next, tmp;
int i; int i;
@ -421,6 +421,7 @@ void des_encrypt(const u8 *clear, const u8 *key, u8 *cypher)
os_memset(pkey, 0, sizeof(pkey)); os_memset(pkey, 0, sizeof(pkey));
os_memset(ek, 0, sizeof(ek)); os_memset(ek, 0, sizeof(ek));
return 0;
} }