diff options
Diffstat (limited to 'lib/crypto/c_src/poly1305.c')
-rw-r--r-- | lib/crypto/c_src/poly1305.c | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/lib/crypto/c_src/poly1305.c b/lib/crypto/c_src/poly1305.c new file mode 100644 index 0000000000..c28deae34b --- /dev/null +++ b/lib/crypto/c_src/poly1305.c @@ -0,0 +1,58 @@ +#include "poly1305.h" + +/* For OpenSSL >= 1.1.1 the hmac_nif and cmac_nif could be integrated into poly1305 (with 'type' as parameter) */ +ERL_NIF_TERM poly1305_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]) +{/* (Key, Text) */ +#ifdef HAVE_POLY1305 + ErlNifBinary key_bin, text, ret_bin; + ERL_NIF_TERM ret = atom_error; + EVP_PKEY *key = NULL; + EVP_MD_CTX *mctx = NULL; + EVP_PKEY_CTX *pctx = NULL; + const EVP_MD *md = NULL; + size_t size; + int type; + + type = EVP_PKEY_POLY1305; + + if (!enif_inspect_binary(env, argv[0], &key_bin) || + !(key_bin.size == 32) ) { + return enif_make_badarg(env); + } + + if (!enif_inspect_binary(env, argv[1], &text) ) { + return enif_make_badarg(env); + } + + key = EVP_PKEY_new_raw_private_key(type, /*engine*/ NULL, key_bin.data, key_bin.size); + + if (!key || + !(mctx = EVP_MD_CTX_new()) || + !EVP_DigestSignInit(mctx, &pctx, md, /*engine*/ NULL, key) || + !EVP_DigestSignUpdate(mctx, text.data, text.size)) { + goto err; + } + + if (!EVP_DigestSignFinal(mctx, NULL, &size) || + !enif_alloc_binary(size, &ret_bin) || + !EVP_DigestSignFinal(mctx, ret_bin.data, &size)) { + goto err; + } + + if ((size != ret_bin.size) && + !enif_realloc_binary(&ret_bin, size)) { + goto err; + } + + ret = enif_make_binary(env, &ret_bin); + + err: + EVP_MD_CTX_free(mctx); + EVP_PKEY_free(key); + return ret; + +#else + return atom_notsup; +#endif +} + |