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Use OpenSSL for RC4 instead of internal implementation

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This commit is contained in:
Jouni Malinen 2009-08-16 22:26:13 +03:00
parent ac73690c06
commit 7cba52d852
3 changed files with 37 additions and 2 deletions
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1
hostapd/Makefile
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@ -436,7 +436,6 @@ ifdef NEED_FIPS186_2_PRF
OBJS += ../src/crypto/fips_prf_openssl.o
OBJS_p += ../src/crypto/fips_prf_openssl.o
endif
CONFIG_INTERNAL_RC4=y
endif
ifeq ($(CONFIG_TLS), gnutls)
OBJS += ../src/crypto/crypto_gnutls.o

37
src/crypto/crypto_openssl.c
View file

@ -96,6 +96,43 @@ void des_encrypt(const u8 *clear, const u8 *key, u8 *cypher)
}
int rc4_skip(const u8 *key, size_t keylen, size_t skip,
u8 *data, size_t data_len)
{
#ifdef OPENSSL_NO_RC4
return -1;
#else /* OPENSSL_NO_RC4 */
EVP_CIPHER_CTX ctx;
int outl;
int res = -1;
unsigned char skip_buf[16];
EVP_CIPHER_CTX_init(&ctx);
if (!EVP_CIPHER_CTX_set_padding(&ctx, 0) ||
!EVP_CipherInit_ex(&ctx, EVP_rc4(), NULL, NULL, NULL, 1) ||
!EVP_CIPHER_CTX_set_key_length(&ctx, keylen) ||
!EVP_CipherInit_ex(&ctx, NULL, NULL, key, NULL, 1))
goto out;
while (skip >= sizeof(skip_buf)) {
size_t len = skip;
if (len > sizeof(skip_buf))
len = sizeof(skip_buf);
if (!EVP_CipherUpdate(&ctx, skip_buf, &outl, skip_buf, len))
goto out;
skip -= len;
}
if (EVP_CipherUpdate(&ctx, data, &outl, data, data_len))
res = 0;
out:
EVP_CIPHER_CTX_cleanup(&ctx);
return res;
#endif /* OPENSSL_NO_RC4 */
}
int md5_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
{
return openssl_digest_vector(EVP_md5(), 0, num_elem, addr, len, mac);

1
wpa_supplicant/Makefile
View file

@ -732,7 +732,6 @@ OBJS_p += ../src/crypto/crypto_openssl.o
ifdef NEED_FIPS186_2_PRF
OBJS += ../src/crypto/fips_prf_openssl.o
endif
CONFIG_INTERNAL_RC4=y
endif
ifeq ($(CONFIG_TLS), gnutls)
OBJS += ../src/crypto/crypto_gnutls.o