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Differential D17276 Diff 48326 crypto/heimdal/lib/krb5/crypto-arcfour.c

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crypto/heimdal/lib/krb5/crypto-arcfour.c

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static krb5_error_code static krb5_error_code
ARCFOUR_subencrypt(krb5_context context, ARCFOUR_subencrypt(krb5_context context,
struct _krb5_key_data *key, struct _krb5_key_data *key,
void *data, void *data,
size_t len, size_t len,
unsigned usage, unsigned usage,
void *ivec) void *ivec)
{ {
EVP_CIPHER_CTX ctx; EVP_CIPHER_CTX *ctx;
struct _krb5_checksum_type *c = _krb5_find_checksum (CKSUMTYPE_RSA_MD5); struct _krb5_checksum_type *c = _krb5_find_checksum (CKSUMTYPE_RSA_MD5);
Checksum k1_c, k2_c, k3_c, cksum; Checksum k1_c, k2_c, k3_c, cksum;
struct _krb5_key_data ke; struct _krb5_key_data ke;
krb5_keyblock kb; krb5_keyblock kb;
unsigned char t[4]; unsigned char t[4];
unsigned char *cdata = data; unsigned char *cdata = data;
unsigned char k1_c_data[16], k2_c_data[16], k3_c_data[16]; unsigned char k1_c_data[16], k2_c_data[16], k3_c_data[16];
krb5_error_code ret; krb5_error_code ret;
Show All 30 Lines krb5_abortx(context, "hmac failed");
k3_c.checksum.length = sizeof(k3_c_data); k3_c.checksum.length = sizeof(k3_c_data);
k3_c.checksum.data = k3_c_data; k3_c.checksum.data = k3_c_data;
ret = _krb5_internal_hmac(NULL, c, data, 16, 0, &ke, &k3_c); ret = _krb5_internal_hmac(NULL, c, data, 16, 0, &ke, &k3_c);
if (ret) if (ret)
krb5_abortx(context, "hmac failed"); krb5_abortx(context, "hmac failed");
EVP_CIPHER_CTX_init(&ctx); ctx = EVP_CIPHER_CTX_new();
if (ctx == NULL)
krb5_abortx(context, "malloc failed");
EVP_CipherInit_ex(&ctx, EVP_rc4(), NULL, k3_c.checksum.data, NULL, 1); EVP_CipherInit_ex(ctx, EVP_rc4(), NULL, k3_c.checksum.data, NULL, 1);
EVP_Cipher(&ctx, cdata + 16, cdata + 16, len - 16); EVP_Cipher(ctx, cdata + 16, cdata + 16, len - 16);
EVP_CIPHER_CTX_cleanup(&ctx); EVP_CIPHER_CTX_free(ctx);
memset (k1_c_data, 0, sizeof(k1_c_data)); memset (k1_c_data, 0, sizeof(k1_c_data));
memset (k2_c_data, 0, sizeof(k2_c_data)); memset (k2_c_data, 0, sizeof(k2_c_data));
memset (k3_c_data, 0, sizeof(k3_c_data)); memset (k3_c_data, 0, sizeof(k3_c_data));
return 0; return 0;
} }
static krb5_error_code static krb5_error_code
ARCFOUR_subdecrypt(krb5_context context, ARCFOUR_subdecrypt(krb5_context context,
struct _krb5_key_data *key, struct _krb5_key_data *key,
void *data, void *data,
size_t len, size_t len,
unsigned usage, unsigned usage,
void *ivec) void *ivec)
{ {
EVP_CIPHER_CTX ctx; EVP_CIPHER_CTX *ctx;
struct _krb5_checksum_type *c = _krb5_find_checksum (CKSUMTYPE_RSA_MD5); struct _krb5_checksum_type *c = _krb5_find_checksum (CKSUMTYPE_RSA_MD5);
Checksum k1_c, k2_c, k3_c, cksum; Checksum k1_c, k2_c, k3_c, cksum;
struct _krb5_key_data ke; struct _krb5_key_data ke;
krb5_keyblock kb; krb5_keyblock kb;
unsigned char t[4]; unsigned char t[4];
unsigned char *cdata = data; unsigned char *cdata = data;
unsigned char k1_c_data[16], k2_c_data[16], k3_c_data[16]; unsigned char k1_c_data[16], k2_c_data[16], k3_c_data[16];
unsigned char cksum_data[16]; unsigned char cksum_data[16];
Show All 21 Lines krb5_abortx(context, "hmac failed");
k3_c.checksum.length = sizeof(k3_c_data); k3_c.checksum.length = sizeof(k3_c_data);
k3_c.checksum.data = k3_c_data; k3_c.checksum.data = k3_c_data;
ret = _krb5_internal_hmac(NULL, c, cdata, 16, 0, &ke, &k3_c); ret = _krb5_internal_hmac(NULL, c, cdata, 16, 0, &ke, &k3_c);
if (ret) if (ret)
krb5_abortx(context, "hmac failed"); krb5_abortx(context, "hmac failed");
EVP_CIPHER_CTX_init(&ctx); ctx = EVP_CIPHER_CTX_new();
EVP_CipherInit_ex(&ctx, EVP_rc4(), NULL, k3_c.checksum.data, NULL, 0); if (ctx == NULL)
EVP_Cipher(&ctx, cdata + 16, cdata + 16, len - 16); krb5_abortx(context, "malloc failed");
EVP_CIPHER_CTX_cleanup(&ctx); EVP_CipherInit_ex(ctx, EVP_rc4(), NULL, k3_c.checksum.data, NULL, 0);
EVP_Cipher(ctx, cdata + 16, cdata + 16, len - 16);
EVP_CIPHER_CTX_free(ctx);
ke.key = &kb; ke.key = &kb;
kb.keyvalue = k2_c.checksum; kb.keyvalue = k2_c.checksum;
cksum.checksum.length = 16; cksum.checksum.length = 16;
cksum.checksum.data = cksum_data; cksum.checksum.data = cksum_data;
ret = _krb5_internal_hmac(NULL, c, cdata + 16, len - 16, 0, &ke, &cksum); ret = _krb5_internal_hmac(NULL, c, cdata + 16, len - 16, 0, &ke, &cksum);
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