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-rw-r--r--lib/crypto/c_src/crypto.c412
1 files changed, 374 insertions, 38 deletions
diff --git a/lib/crypto/c_src/crypto.c b/lib/crypto/c_src/crypto.c
index 26e2486dc2..aa99f2236e 100644
--- a/lib/crypto/c_src/crypto.c
+++ b/lib/crypto/c_src/crypto.c
@@ -54,6 +54,10 @@
#include <openssl/evp.h>
#include <openssl/hmac.h>
+#if OPENSSL_VERSION_NUMBER >= 0x1000000fL
+#include <openssl/modes.h>
+#endif
+
#include "crypto_callback.h"
#if OPENSSL_VERSION_NUMBER >= 0x00908000L && !defined(OPENSSL_NO_SHA224) && defined(NID_sha224)\
@@ -85,13 +89,32 @@
# define HAVE_AES_IGE
#endif
+#if OPENSSL_VERSION_NUMBER >= 0x1000100fL
+# define HAVE_GCM
+#endif
+
+#if defined(NID_chacha20) && !defined(OPENSSL_NO_CHACHA) && !defined(OPENSSL_NO_POLY1305)
+# define HAVE_CHACHA20_POLY1305
+#endif
+
#if defined(HAVE_EC)
#include <openssl/ec.h>
#include <openssl/ecdh.h>
#include <openssl/ecdsa.h>
#endif
+#if defined(HAVE_CHACHA20_POLY1305)
+#include <openssl/chacha.h>
+#include <openssl/poly1305.h>
+#if !defined(CHACHA20_NONCE_LEN)
+# define CHACHA20_NONCE_LEN 8
+#endif
+#if !defined(POLY1305_TAG_LEN)
+# define POLY1305_TAG_LEN 16
+#endif
+
+#endif
#ifdef VALGRIND
# include <valgrind/memcheck.h>
@@ -219,6 +242,7 @@ static ERL_NIF_TERM aes_cfb_8_crypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM
static ERL_NIF_TERM aes_cfb_128_crypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
static ERL_NIF_TERM aes_ctr_encrypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
static ERL_NIF_TERM aes_ctr_stream_encrypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM aes_ecb_crypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
static ERL_NIF_TERM rand_bytes_1(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
static ERL_NIF_TERM strong_rand_bytes_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
static ERL_NIF_TERM rand_bytes_3(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
@@ -257,6 +281,11 @@ static ERL_NIF_TERM ecdh_compute_key_nif(ErlNifEnv* env, int argc, const ERL_NIF
static ERL_NIF_TERM rand_seed_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM aes_gcm_encrypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM aes_gcm_decrypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
+
+static ERL_NIF_TERM chacha20_poly1305_encrypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM chacha20_poly1305_decrypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
/* helpers */
static void init_algorithms_types(ErlNifEnv*);
@@ -351,6 +380,7 @@ static ErlNifFunc nif_funcs[] = {
{"aes_ctr_decrypt", 3, aes_ctr_encrypt},
{"aes_ctr_stream_encrypt", 2, aes_ctr_stream_encrypt},
{"aes_ctr_stream_decrypt", 2, aes_ctr_stream_encrypt},
+ {"aes_ecb_crypt", 3, aes_ecb_crypt},
{"rand_bytes", 1, rand_bytes_1},
{"strong_rand_bytes_nif", 1, strong_rand_bytes_nif},
{"rand_bytes", 3, rand_bytes_3},
@@ -382,12 +412,20 @@ static ErlNifFunc nif_funcs[] = {
{"bf_ecb_crypt", 3, bf_ecb_crypt},
{"blowfish_ofb64_encrypt", 3, blowfish_ofb64_encrypt},
- {"ec_key_generate", 1, ec_key_generate},
+ {"ec_key_generate", 2, ec_key_generate},
{"ecdsa_sign_nif", 4, ecdsa_sign_nif},
{"ecdsa_verify_nif", 5, ecdsa_verify_nif},
{"ecdh_compute_key_nif", 3, ecdh_compute_key_nif},
- {"rand_seed_nif", 1, rand_seed_nif}
+ {"rand_seed_nif", 1, rand_seed_nif},
+
+ {"aes_gcm_encrypt", 4, aes_gcm_encrypt},
+ {"aes_gcm_decrypt", 5, aes_gcm_decrypt},
+
+ {"chacha20_poly1305_encrypt", 4, chacha20_poly1305_encrypt},
+ {"chacha20_poly1305_decrypt", 5, chacha20_poly1305_decrypt}
+
+
};
ERL_NIF_INIT(crypto,nif_funcs,load,NULL,upgrade,unload)
@@ -725,7 +763,7 @@ static ERL_NIF_TERM algo_hash[8]; /* increase when extending the list */
static int algo_pubkey_cnt;
static ERL_NIF_TERM algo_pubkey[3]; /* increase when extending the list */
static int algo_cipher_cnt;
-static ERL_NIF_TERM algo_cipher[2]; /* increase when extending the list */
+static ERL_NIF_TERM algo_cipher[4]; /* increase when extending the list */
static void init_algorithms_types(ErlNifEnv* env)
{
@@ -763,6 +801,12 @@ static void init_algorithms_types(ErlNifEnv* env)
#ifdef HAVE_AES_IGE
algo_cipher[algo_cipher_cnt++] = enif_make_atom(env,"aes_ige256");
#endif
+#if defined(HAVE_GCM)
+ algo_cipher[algo_cipher_cnt++] = enif_make_atom(env,"aes_gcm");
+#endif
+#if defined(HAVE_CHACHA20_POLY1305)
+ algo_cipher[algo_cipher_cnt++] = enif_make_atom(env,"chacha20_poly1305");
+#endif
ASSERT(algo_hash_cnt <= sizeof(algo_hash)/sizeof(ERL_NIF_TERM));
ASSERT(algo_pubkey_cnt <= sizeof(algo_pubkey)/sizeof(ERL_NIF_TERM));
@@ -1762,6 +1806,268 @@ static ERL_NIF_TERM aes_ctr_stream_encrypt(ErlNifEnv* env, int argc, const ERL_N
return ret;
}
+static ERL_NIF_TERM aes_gcm_encrypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
+{/* (Key,Iv,AAD,In) */
+#if defined(HAVE_GCM)
+ GCM128_CONTEXT *ctx = NULL;
+ ErlNifBinary key, iv, aad, in;
+ AES_KEY aes_key;
+ unsigned char *outp;
+ ERL_NIF_TERM out, out_tag;
+
+ CHECK_OSE_CRYPTO();
+
+ if (!enif_inspect_iolist_as_binary(env, argv[0], &key)
+ || AES_set_encrypt_key(key.data, key.size*8, &aes_key) != 0
+ || !enif_inspect_binary(env, argv[1], &iv) || iv.size == 0
+ || !enif_inspect_iolist_as_binary(env, argv[2], &aad)
+ || !enif_inspect_iolist_as_binary(env, argv[3], &in)) {
+ return enif_make_badarg(env);
+ }
+
+ if (!(ctx = CRYPTO_gcm128_new(&aes_key, (block128_f)AES_encrypt)))
+ return atom_error;
+
+ CRYPTO_gcm128_setiv(ctx, iv.data, iv.size);
+
+ if (CRYPTO_gcm128_aad(ctx, aad.data, aad.size))
+ goto out_err;
+
+ outp = enif_make_new_binary(env, in.size, &out);
+
+ /* encrypt */
+ if (CRYPTO_gcm128_encrypt(ctx, in.data, outp, in.size))
+ goto out_err;
+
+ /* calculate the tag */
+ CRYPTO_gcm128_tag(ctx, enif_make_new_binary(env, EVP_GCM_TLS_TAG_LEN, &out_tag), EVP_GCM_TLS_TAG_LEN);
+ CRYPTO_gcm128_release(ctx);
+
+ CONSUME_REDS(env, in);
+
+ return enif_make_tuple2(env, out, out_tag);
+
+out_err:
+ CRYPTO_gcm128_release(ctx);
+ return atom_error;
+
+#else
+ return atom_notsup;
+#endif
+}
+
+static ERL_NIF_TERM aes_gcm_decrypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
+{/* (Key,Iv,AAD,In,Tag) */
+#if defined(HAVE_GCM)
+ GCM128_CONTEXT *ctx;
+ ErlNifBinary key, iv, aad, in, tag;
+ AES_KEY aes_key;
+ unsigned char *outp;
+ ERL_NIF_TERM out;
+
+ CHECK_OSE_CRYPTO();
+
+ if (!enif_inspect_iolist_as_binary(env, argv[0], &key)
+ || AES_set_encrypt_key(key.data, key.size*8, &aes_key) != 0
+ || !enif_inspect_binary(env, argv[1], &iv) || iv.size == 0
+ || !enif_inspect_iolist_as_binary(env, argv[2], &aad)
+ || !enif_inspect_iolist_as_binary(env, argv[3], &in)
+ || !enif_inspect_iolist_as_binary(env, argv[4], &tag) || tag.size != EVP_GCM_TLS_TAG_LEN) {
+ return enif_make_badarg(env);
+ }
+
+ if (!(ctx = CRYPTO_gcm128_new(&aes_key, (block128_f)AES_encrypt)))
+ return atom_error;
+
+ CRYPTO_gcm128_setiv(ctx, iv.data, iv.size);
+
+ if (CRYPTO_gcm128_aad(ctx, aad.data, aad.size))
+ goto out_err;
+
+ outp = enif_make_new_binary(env, in.size, &out);
+
+ /* decrypt */
+ if (CRYPTO_gcm128_decrypt(ctx, in.data, outp, in.size))
+ goto out_err;
+
+ /* calculate and check the tag */
+ if (CRYPTO_gcm128_finish(ctx, tag.data, EVP_GCM_TLS_TAG_LEN))
+ goto out_err;
+
+ CRYPTO_gcm128_release(ctx);
+ CONSUME_REDS(env, in);
+
+ return out;
+
+out_err:
+ CRYPTO_gcm128_release(ctx);
+ return atom_error;
+#else
+ return atom_notsup;
+#endif
+}
+
+#if defined(HAVE_CHACHA20_POLY1305)
+static void
+poly1305_update_with_length(poly1305_state *poly1305,
+ const unsigned char *data, size_t data_len)
+{
+ size_t j = data_len;
+ unsigned char length_bytes[8];
+ unsigned i;
+
+ for (i = 0; i < sizeof(length_bytes); i++) {
+ length_bytes[i] = j;
+ j >>= 8;
+ }
+
+ CRYPTO_poly1305_update(poly1305, data, data_len);
+ CRYPTO_poly1305_update(poly1305, length_bytes, sizeof(length_bytes));
+}
+#endif
+
+static ERL_NIF_TERM chacha20_poly1305_encrypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
+{/* (Key,Iv,AAD,In) */
+#if defined(HAVE_CHACHA20_POLY1305)
+ ErlNifBinary key, iv, aad, in;
+ unsigned char *outp;
+ ERL_NIF_TERM out, out_tag;
+ ErlNifUInt64 in_len_64;
+ unsigned char poly1305_key[32];
+ poly1305_state poly1305;
+
+ CHECK_OSE_CRYPTO();
+
+ if (!enif_inspect_iolist_as_binary(env, argv[0], &key) || key.size != 32
+ || !enif_inspect_binary(env, argv[1], &iv) || iv.size != CHACHA20_NONCE_LEN
+ || !enif_inspect_iolist_as_binary(env, argv[2], &aad)
+ || !enif_inspect_iolist_as_binary(env, argv[3], &in)) {
+ return enif_make_badarg(env);
+ }
+
+ /* Take from OpenSSL patch set/LibreSSL:
+ *
+ * The underlying ChaCha implementation may not overflow the block
+ * counter into the second counter word. Therefore we disallow
+ * individual operations that work on more than 2TB at a time.
+ * in_len_64 is needed because, on 32-bit platforms, size_t is only
+ * 32-bits and this produces a warning because it's always false.
+ * Casting to uint64_t inside the conditional is not sufficient to stop
+ * the warning. */
+ in_len_64 = in.size;
+ if (in_len_64 >= (1ULL << 32) * 64 - 64)
+ return enif_make_badarg(env);
+
+ memset(poly1305_key, 0, sizeof(poly1305_key));
+ CRYPTO_chacha_20(poly1305_key, poly1305_key, sizeof(poly1305_key), key.data, iv.data, 0);
+
+ outp = enif_make_new_binary(env, in.size, &out);
+
+ CRYPTO_poly1305_init(&poly1305, poly1305_key);
+ poly1305_update_with_length(&poly1305, aad.data, aad.size);
+ CRYPTO_chacha_20(outp, in.data, in.size, key.data, iv.data, 1);
+ poly1305_update_with_length(&poly1305, outp, in.size);
+
+ CRYPTO_poly1305_finish(&poly1305, enif_make_new_binary(env, POLY1305_TAG_LEN, &out_tag));
+
+ CONSUME_REDS(env, in);
+
+ return enif_make_tuple2(env, out, out_tag);
+
+#else
+ return atom_notsup;
+#endif
+}
+
+static ERL_NIF_TERM chacha20_poly1305_decrypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
+{/* (Key,Iv,AAD,In,Tag) */
+#if defined(HAVE_CHACHA20_POLY1305)
+ ErlNifBinary key, iv, aad, in, tag;
+ unsigned char *outp;
+ ERL_NIF_TERM out;
+ ErlNifUInt64 in_len_64;
+ unsigned char poly1305_key[32];
+ unsigned char mac[POLY1305_TAG_LEN];
+ poly1305_state poly1305;
+
+ CHECK_OSE_CRYPTO();
+
+ if (!enif_inspect_iolist_as_binary(env, argv[0], &key) || key.size != 32
+ || !enif_inspect_binary(env, argv[1], &iv) || iv.size != CHACHA20_NONCE_LEN
+ || !enif_inspect_iolist_as_binary(env, argv[2], &aad)
+ || !enif_inspect_iolist_as_binary(env, argv[3], &in)
+ || !enif_inspect_iolist_as_binary(env, argv[4], &tag) || tag.size != POLY1305_TAG_LEN) {
+ return enif_make_badarg(env);
+ }
+
+ /* Take from OpenSSL patch set/LibreSSL:
+ *
+ * The underlying ChaCha implementation may not overflow the block
+ * counter into the second counter word. Therefore we disallow
+ * individual operations that work on more than 2TB at a time.
+ * in_len_64 is needed because, on 32-bit platforms, size_t is only
+ * 32-bits and this produces a warning because it's always false.
+ * Casting to uint64_t inside the conditional is not sufficient to stop
+ * the warning. */
+ in_len_64 = in.size;
+ if (in_len_64 >= (1ULL << 32) * 64 - 64)
+ return enif_make_badarg(env);
+
+ memset(poly1305_key, 0, sizeof(poly1305_key));
+ CRYPTO_chacha_20(poly1305_key, poly1305_key, sizeof(poly1305_key), key.data, iv.data, 0);
+
+ CRYPTO_poly1305_init(&poly1305, poly1305_key);
+ poly1305_update_with_length(&poly1305, aad.data, aad.size);
+ poly1305_update_with_length(&poly1305, in.data, in.size);
+ CRYPTO_poly1305_finish(&poly1305, mac);
+
+ if (memcmp(mac, tag.data, POLY1305_TAG_LEN) != 0)
+ return atom_error;
+
+ outp = enif_make_new_binary(env, in.size, &out);
+
+ CRYPTO_chacha_20(outp, in.data, in.size, key.data, iv.data, 1);
+
+ CONSUME_REDS(env, in);
+
+ return out;
+#else
+ return atom_notsup;
+#endif
+}
+
+static ERL_NIF_TERM aes_ecb_crypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
+{/* (Key, Data, IsEncrypt) */
+ ErlNifBinary key_bin, data_bin;
+ AES_KEY aes_key;
+ int i;
+ unsigned char* ret_ptr;
+ ERL_NIF_TERM ret;
+
+ CHECK_OSE_CRYPTO();
+
+ if (!enif_inspect_iolist_as_binary(env, argv[0], &key_bin)
+ || (key_bin.size != 16 && key_bin.size != 32)
+ || !enif_inspect_iolist_as_binary(env, argv[1], &data_bin)
+ || data_bin.size % 16 != 0) {
+ return enif_make_badarg(env);
+ }
+
+ if (argv[2] == atom_true) {
+ i = AES_ENCRYPT;
+ AES_set_encrypt_key(key_bin.data, key_bin.size*8, &aes_key);
+ }
+ else {
+ i = AES_DECRYPT;
+ AES_set_decrypt_key(key_bin.data, key_bin.size*8, &aes_key);
+ }
+
+ ret_ptr = enif_make_new_binary(env, data_bin.size, &ret);
+ AES_ecb_encrypt(data_bin.data, ret_ptr, &aes_key, i);
+ CONSUME_REDS(env,data_bin);
+ return ret;
+}
+
static ERL_NIF_TERM rand_bytes_1(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
{/* (Bytes) */
unsigned bytes;
@@ -2194,11 +2500,12 @@ done:
static ERL_NIF_TERM aes_cbc_crypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
{/* (Key, IVec, Data, IsEncrypt) */
ErlNifBinary key_bin, ivec_bin, data_bin;
- AES_KEY aes_key;
unsigned char ivec[16];
- int i;
+ int enc, i = 0, outlen = 0;
+ EVP_CIPHER_CTX *ctx = NULL;
+ const EVP_CIPHER *cipher = NULL;
unsigned char* ret_ptr;
- ERL_NIF_TERM ret;
+ ERL_NIF_TERM ret;
CHECK_OSE_CRYPTO();
@@ -2212,20 +2519,44 @@ static ERL_NIF_TERM aes_cbc_crypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM a
return enif_make_badarg(env);
}
- if (argv[3] == atom_true) {
- i = AES_ENCRYPT;
- AES_set_encrypt_key(key_bin.data, key_bin.size*8, &aes_key);
- }
- else {
- i = AES_DECRYPT;
- AES_set_decrypt_key(key_bin.data, key_bin.size*8, &aes_key);
- }
+ if (argv[3] == atom_true)
+ enc = 1;
+ else
+ enc = 0;
+
+ if (!(ctx = EVP_CIPHER_CTX_new()))
+ return enif_make_badarg(env);
+
+ if (key_bin.size == 16)
+ cipher = EVP_aes_128_cbc();
+ else if (key_bin.size == 32)
+ cipher = EVP_aes_256_cbc();
+
+ memcpy(ivec, ivec_bin.data, 16); /* writeable copy */
+
+ /* openssl docs say we need to leave at least 3 blocks available
+ at the end of the buffer for EVP calls. let's be safe */
+ ret_ptr = enif_make_new_binary(env, data_bin.size + 16*3, &ret);
+
+ if (EVP_CipherInit_ex(ctx, cipher, NULL, key_bin.data, ivec, enc) != 1)
+ return enif_make_badarg(env);
+
+ /* disable padding, we only handle whole blocks */
+ EVP_CIPHER_CTX_set_padding(ctx, 0);
+
+ if (EVP_CipherUpdate(ctx, ret_ptr, &i, data_bin.data, data_bin.size) != 1)
+ return enif_make_badarg(env);
+ outlen += i;
+ if (EVP_CipherFinal_ex(ctx, ret_ptr + outlen, &i) != 1)
+ return enif_make_badarg(env);
+ outlen += i;
+
+ EVP_CIPHER_CTX_free(ctx);
- ret_ptr = enif_make_new_binary(env, data_bin.size, &ret);
- memcpy(ivec, ivec_bin.data, 16); /* writable copy */
- AES_cbc_encrypt(data_bin.data, ret_ptr, data_bin.size, &aes_key, ivec, i);
CONSUME_REDS(env,data_bin);
- return ret;
+
+ /* the garbage collector is going to love this */
+ return enif_make_sub_binary(env, ret, 0, outlen);
}
static ERL_NIF_TERM aes_ige_crypt_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
@@ -3419,32 +3750,37 @@ out:
static ERL_NIF_TERM ec_key_generate(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
{
#if defined(HAVE_EC)
- EC_KEY *key = ec_key_new(env, argv[0]);
+ EC_KEY *key;
+ const EC_GROUP *group;
+ const EC_POINT *public_key;
+ ERL_NIF_TERM priv_key;
+ ERL_NIF_TERM pub_key = atom_undefined;
CHECK_OSE_CRYPTO();
- if (key && EC_KEY_generate_key(key)) {
- const EC_GROUP *group;
- const EC_POINT *public_key;
- ERL_NIF_TERM priv_key;
- ERL_NIF_TERM pub_key = atom_undefined;
-
- group = EC_KEY_get0_group(key);
- public_key = EC_KEY_get0_public_key(key);
+ if (!get_ec_key(env, argv[0], argv[1], atom_undefined, &key))
+ goto badarg;
- if (group && public_key) {
- pub_key = point2term(env, group, public_key,
- EC_KEY_get_conv_form(key));
- }
- priv_key = bn2term(env, EC_KEY_get0_private_key(key));
- EC_KEY_free(key);
- return enif_make_tuple2(env, pub_key, priv_key);
+ if (argv[1] == atom_undefined) {
+ if (!EC_KEY_generate_key(key))
+ goto badarg;
}
- else {
- if (key)
- EC_KEY_free(key);
- return enif_make_badarg(env);
+
+ group = EC_KEY_get0_group(key);
+ public_key = EC_KEY_get0_public_key(key);
+
+ if (group && public_key) {
+ pub_key = point2term(env, group, public_key,
+ EC_KEY_get_conv_form(key));
}
+ priv_key = bn2term(env, EC_KEY_get0_private_key(key));
+ EC_KEY_free(key);
+ return enif_make_tuple2(env, pub_key, priv_key);
+
+badarg:
+ if (key)
+ EC_KEY_free(key);
+ return enif_make_badarg(env);
#else
return atom_notsup;
#endif
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