diff options
Diffstat (limited to 'lib/crypto/c_src')
| -rw-r--r-- | lib/crypto/c_src/crypto.c | 276 |
1 files changed, 274 insertions, 2 deletions
diff --git a/lib/crypto/c_src/crypto.c b/lib/crypto/c_src/crypto.c index e7215eeb64..a42de9adb1 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> @@ -257,6 +280,11 @@ 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*); @@ -387,7 +415,15 @@ static ErlNifFunc nif_funcs[] = { {"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 +761,7 @@ 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 +799,12 @@ 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)); @@ -1760,6 +1802,236 @@ 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 rand_bytes_1(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]) {/* (Bytes) */ unsigned bytes; |