diff options
Diffstat (limited to 'lib/crypto/c_src/pkey.c')
| -rw-r--r-- | lib/crypto/c_src/pkey.c | 1170 |
1 files changed, 1170 insertions, 0 deletions
diff --git a/lib/crypto/c_src/pkey.c b/lib/crypto/c_src/pkey.c new file mode 100644 index 0000000000..bd56b2d977 --- /dev/null +++ b/lib/crypto/c_src/pkey.c @@ -0,0 +1,1170 @@ +/* + * %CopyrightBegin% + * + * Copyright Ericsson AB 2010-2018. All Rights Reserved. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + * %CopyrightEnd% + */ + +#include "pkey.h" +#include "bn.h" +#include "digest.h" +#include "dss.h" +#include "ec.h" +#include "eddsa.h" +#include "engine.h" +#include "rsa.h" + +#define PKEY_BADARG -1 +#define PKEY_NOTSUP 0 +#define PKEY_OK 1 + +typedef struct PKeyCryptOptions { + const EVP_MD *rsa_mgf1_md; + ErlNifBinary rsa_oaep_label; + const EVP_MD *rsa_oaep_md; + int rsa_padding; + const EVP_MD *signature_md; +} PKeyCryptOptions; + +typedef struct PKeySignOptions { + const EVP_MD *rsa_mgf1_md; + int rsa_padding; + int rsa_pss_saltlen; +} PKeySignOptions; + + +static int get_pkey_digest_type(ErlNifEnv *env, ERL_NIF_TERM algorithm, ERL_NIF_TERM type, + const EVP_MD **md); +static int get_pkey_sign_digest(ErlNifEnv *env, ERL_NIF_TERM algorithm, + ERL_NIF_TERM type, ERL_NIF_TERM data, + unsigned char *md_value, const EVP_MD **mdp, + unsigned char **tbsp, size_t *tbslenp); +static int get_pkey_sign_options(ErlNifEnv *env, ERL_NIF_TERM algorithm, ERL_NIF_TERM options, + const EVP_MD *md, PKeySignOptions *opt); +static int get_pkey_private_key(ErlNifEnv *env, ERL_NIF_TERM algorithm, ERL_NIF_TERM key, EVP_PKEY **pkey); +static int get_pkey_public_key(ErlNifEnv *env, ERL_NIF_TERM algorithm, ERL_NIF_TERM key, + EVP_PKEY **pkey); +static int get_pkey_crypt_options(ErlNifEnv *env, ERL_NIF_TERM algorithm, ERL_NIF_TERM options, + PKeyCryptOptions *opt); +static size_t size_of_RSA(EVP_PKEY *pkey); + + +static int get_pkey_digest_type(ErlNifEnv *env, ERL_NIF_TERM algorithm, ERL_NIF_TERM type, + const EVP_MD **md) +{ + struct digest_type_t *digp = NULL; + *md = NULL; + + if (type == atom_none && algorithm == atom_rsa) return PKEY_OK; +#ifdef HAVE_EDDSA + if (algorithm == atom_eddsa) return PKEY_OK; +#endif + digp = get_digest_type(type); + if (!digp) return PKEY_BADARG; + if (!digp->md.p) return PKEY_NOTSUP; + + *md = digp->md.p; + return PKEY_OK; +} + +static int get_pkey_sign_digest(ErlNifEnv *env, ERL_NIF_TERM algorithm, + ERL_NIF_TERM type, ERL_NIF_TERM data, + unsigned char *md_value, const EVP_MD **mdp, + unsigned char **tbsp, size_t *tbslenp) +{ + int i; + const ERL_NIF_TERM *tpl_terms; + int tpl_arity; + ErlNifBinary tbs_bin; + EVP_MD_CTX *mdctx; + const EVP_MD *md = *mdp; + unsigned char *tbs = *tbsp; + size_t tbslen = *tbslenp; + unsigned int tbsleni; + + if ((i = get_pkey_digest_type(env, algorithm, type, &md)) != PKEY_OK) { + return i; + } + if (enif_get_tuple(env, data, &tpl_arity, &tpl_terms)) { + if (tpl_arity != 2 || tpl_terms[0] != atom_digest + || !enif_inspect_binary(env, tpl_terms[1], &tbs_bin) + || (md != NULL && tbs_bin.size != EVP_MD_size(md))) { + return PKEY_BADARG; + } + /* We have a digest (= hashed text) in tbs_bin */ + tbs = tbs_bin.data; + tbslen = tbs_bin.size; + } else if (md == NULL) { + if (!enif_inspect_binary(env, data, &tbs_bin)) { + return PKEY_BADARG; + } + /* md == NULL, that is no hashing because DigestType argument was atom_none */ + tbs = tbs_bin.data; + tbslen = tbs_bin.size; + } else { + if (!enif_inspect_binary(env, data, &tbs_bin)) { + return PKEY_BADARG; + } + /* We have the cleartext in tbs_bin and the hash algo info in md */ + tbs = md_value; + mdctx = EVP_MD_CTX_create(); + if (!mdctx) { + return PKEY_BADARG; + } + /* Looks well, now hash the plain text into a digest according to md */ + if (EVP_DigestInit_ex(mdctx, md, NULL) <= 0) { + EVP_MD_CTX_destroy(mdctx); + return PKEY_BADARG; + } + if (EVP_DigestUpdate(mdctx, tbs_bin.data, tbs_bin.size) <= 0) { + EVP_MD_CTX_destroy(mdctx); + return PKEY_BADARG; + } + if (EVP_DigestFinal_ex(mdctx, tbs, &tbsleni) <= 0) { + EVP_MD_CTX_destroy(mdctx); + return PKEY_BADARG; + } + tbslen = (size_t)(tbsleni); + EVP_MD_CTX_destroy(mdctx); + } + + *mdp = md; + *tbsp = tbs; + *tbslenp = tbslen; + + return PKEY_OK; +} + +static int get_pkey_sign_options(ErlNifEnv *env, ERL_NIF_TERM algorithm, ERL_NIF_TERM options, + const EVP_MD *md, PKeySignOptions *opt) +{ + ERL_NIF_TERM head, tail; + const ERL_NIF_TERM *tpl_terms; + int tpl_arity; + const EVP_MD *opt_md; + int i; + + if (!enif_is_list(env, options)) { + return PKEY_BADARG; + } + + /* defaults */ + if (algorithm == atom_rsa) { + opt->rsa_mgf1_md = NULL; + opt->rsa_padding = RSA_PKCS1_PADDING; + opt->rsa_pss_saltlen = -2; + } + + if (enif_is_empty_list(env, options)) { + return PKEY_OK; + } + + if (algorithm == atom_rsa) { + tail = options; + while (enif_get_list_cell(env, tail, &head, &tail)) { + if (enif_get_tuple(env, head, &tpl_arity, &tpl_terms) && tpl_arity == 2) { + if (tpl_terms[0] == atom_rsa_mgf1_md && enif_is_atom(env, tpl_terms[1])) { + i = get_pkey_digest_type(env, algorithm, tpl_terms[1], &opt_md); + if (i != PKEY_OK) { + return i; + } + opt->rsa_mgf1_md = opt_md; + } else if (tpl_terms[0] == atom_rsa_padding) { + if (tpl_terms[1] == atom_rsa_pkcs1_padding) { + opt->rsa_padding = RSA_PKCS1_PADDING; + } else if (tpl_terms[1] == atom_rsa_pkcs1_pss_padding) { +#ifdef HAVE_RSA_PKCS1_PSS_PADDING + opt->rsa_padding = RSA_PKCS1_PSS_PADDING; + if (opt->rsa_mgf1_md == NULL) { + opt->rsa_mgf1_md = md; + } +#else + return PKEY_NOTSUP; +#endif + } else if (tpl_terms[1] == atom_rsa_x931_padding) { + opt->rsa_padding = RSA_X931_PADDING; + } else if (tpl_terms[1] == atom_rsa_no_padding) { + opt->rsa_padding = RSA_NO_PADDING; + } else { + return PKEY_BADARG; + } + } else if (tpl_terms[0] == atom_rsa_pss_saltlen) { + if (!enif_get_int(env, tpl_terms[1], &(opt->rsa_pss_saltlen)) + || opt->rsa_pss_saltlen < -2) { + return PKEY_BADARG; + } + } else { + return PKEY_BADARG; + } + } else { + return PKEY_BADARG; + } + } + } else { + return PKEY_BADARG; + } + + return PKEY_OK; +} + +static int get_pkey_private_key(ErlNifEnv *env, ERL_NIF_TERM algorithm, ERL_NIF_TERM key, EVP_PKEY **pkey) +{ + if (enif_is_map(env, key)) { +#ifdef HAS_ENGINE_SUPPORT + /* Use key stored in engine */ + ENGINE *e; + char *id = NULL; + char *password; + + if (!get_engine_and_key_id(env, key, &id, &e)) + return PKEY_BADARG; + password = get_key_password(env, key); + *pkey = ENGINE_load_private_key(e, id, NULL, password); + if (password) enif_free(password); + enif_free(id); + if (!*pkey) + return PKEY_BADARG; +#else + return PKEY_BADARG; +#endif + } + else if (algorithm == atom_rsa) { + RSA *rsa = RSA_new(); + + if (!get_rsa_private_key(env, key, rsa)) { + RSA_free(rsa); + return PKEY_BADARG; + } + + *pkey = EVP_PKEY_new(); + if (!EVP_PKEY_assign_RSA(*pkey, rsa)) { + EVP_PKEY_free(*pkey); + RSA_free(rsa); + return PKEY_BADARG; + } + } else if (algorithm == atom_ecdsa) { +#if defined(HAVE_EC) + EC_KEY *ec = NULL; + const ERL_NIF_TERM *tpl_terms; + int tpl_arity; + + if (enif_get_tuple(env, key, &tpl_arity, &tpl_terms) && tpl_arity == 2 + && enif_is_tuple(env, tpl_terms[0]) && enif_is_binary(env, tpl_terms[1]) + && get_ec_key(env, tpl_terms[0], tpl_terms[1], atom_undefined, &ec)) { + + *pkey = EVP_PKEY_new(); + if (!EVP_PKEY_assign_EC_KEY(*pkey, ec)) { + EVP_PKEY_free(*pkey); + EC_KEY_free(ec); + return PKEY_BADARG; + } + } else { + return PKEY_BADARG; + } +#else + return PKEY_NOTSUP; +#endif + } else if (algorithm == atom_eddsa) { +#if defined(HAVE_EDDSA) + if (!get_eddsa_key(env, 0, key, pkey)) { + return PKEY_BADARG; + } +#else + return PKEY_NOTSUP; +#endif + } else if (algorithm == atom_dss) { + DSA *dsa = DSA_new(); + + if (!get_dss_private_key(env, key, dsa)) { + DSA_free(dsa); + return PKEY_BADARG; + } + + *pkey = EVP_PKEY_new(); + if (!EVP_PKEY_assign_DSA(*pkey, dsa)) { + EVP_PKEY_free(*pkey); + DSA_free(dsa); + return PKEY_BADARG; + } + } else { + return PKEY_BADARG; + } + + return PKEY_OK; +} + +static int get_pkey_public_key(ErlNifEnv *env, ERL_NIF_TERM algorithm, ERL_NIF_TERM key, + EVP_PKEY **pkey) +{ + if (enif_is_map(env, key)) { +#ifdef HAS_ENGINE_SUPPORT + /* Use key stored in engine */ + ENGINE *e; + char *id = NULL; + char *password; + + if (!get_engine_and_key_id(env, key, &id, &e)) + return PKEY_BADARG; + password = get_key_password(env, key); + *pkey = ENGINE_load_public_key(e, id, NULL, password); + if (password) enif_free(password); + enif_free(id); + if (!pkey) + return PKEY_BADARG; +#else + return PKEY_BADARG; +#endif + } else if (algorithm == atom_rsa) { + RSA *rsa = RSA_new(); + + if (!get_rsa_public_key(env, key, rsa)) { + RSA_free(rsa); + return PKEY_BADARG; + } + + *pkey = EVP_PKEY_new(); + if (!EVP_PKEY_assign_RSA(*pkey, rsa)) { + EVP_PKEY_free(*pkey); + RSA_free(rsa); + return PKEY_BADARG; + } + } else if (algorithm == atom_ecdsa) { +#if defined(HAVE_EC) + EC_KEY *ec = NULL; + const ERL_NIF_TERM *tpl_terms; + int tpl_arity; + + if (enif_get_tuple(env, key, &tpl_arity, &tpl_terms) && tpl_arity == 2 + && enif_is_tuple(env, tpl_terms[0]) && enif_is_binary(env, tpl_terms[1]) + && get_ec_key(env, tpl_terms[0], atom_undefined, tpl_terms[1], &ec)) { + + *pkey = EVP_PKEY_new(); + if (!EVP_PKEY_assign_EC_KEY(*pkey, ec)) { + EVP_PKEY_free(*pkey); + EC_KEY_free(ec); + return PKEY_BADARG; + } + } else { + return PKEY_BADARG; + } +#else + return PKEY_NOTSUP; +#endif + } else if (algorithm == atom_eddsa) { +#if defined(HAVE_EDDSA) + if (!get_eddsa_key(env, 1, key, pkey)) { + return PKEY_BADARG; + } +#else + return PKEY_NOTSUP; +#endif + } else if (algorithm == atom_dss) { + DSA *dsa = DSA_new(); + + if (!get_dss_public_key(env, key, dsa)) { + DSA_free(dsa); + return PKEY_BADARG; + } + + *pkey = EVP_PKEY_new(); + if (!EVP_PKEY_assign_DSA(*pkey, dsa)) { + EVP_PKEY_free(*pkey); + DSA_free(dsa); + return PKEY_BADARG; + } + } else { + return PKEY_BADARG; + } + + return PKEY_OK; +} + +ERL_NIF_TERM pkey_sign_nif(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]) +{/* (Algorithm, Type, Data|{digest,Digest}, Key|#{}, Options) */ + int i; + const EVP_MD *md = NULL; + unsigned char md_value[EVP_MAX_MD_SIZE]; + EVP_PKEY *pkey; +#ifdef HAS_EVP_PKEY_CTX + EVP_PKEY_CTX *ctx; + size_t siglen; +#else + unsigned len, siglen; +#endif + PKeySignOptions sig_opt; + ErlNifBinary sig_bin; /* signature */ + unsigned char *tbs; /* data to be signed */ + size_t tbslen; +/*char buf[1024]; +enif_get_atom(env,argv[0],buf,1024,ERL_NIF_LATIN1); printf("algo=%s ",buf); +enif_get_atom(env,argv[1],buf,1024,ERL_NIF_LATIN1); printf("hash=%s ",buf); +printf("\r\n"); +*/ + +#ifndef HAS_ENGINE_SUPPORT + if (enif_is_map(env, argv[3])) { + return atom_notsup; + } +#endif + + i = get_pkey_sign_digest(env, argv[0], argv[1], argv[2], md_value, &md, &tbs, &tbslen); + if (i != PKEY_OK) { + if (i == PKEY_NOTSUP) + return atom_notsup; + else + return enif_make_badarg(env); + } + + i = get_pkey_sign_options(env, argv[0], argv[4], md, &sig_opt); + if (i != PKEY_OK) { + if (i == PKEY_NOTSUP) + return atom_notsup; + else + return enif_make_badarg(env); + } + + if (get_pkey_private_key(env, argv[0], argv[3], &pkey) != PKEY_OK) { + return enif_make_badarg(env); + } + +#ifdef HAS_EVP_PKEY_CTX + ctx = EVP_PKEY_CTX_new(pkey, NULL); + if (!ctx) goto badarg; + + if (argv[0] != atom_eddsa) { + if (EVP_PKEY_sign_init(ctx) <= 0) goto badarg; + if (md != NULL && EVP_PKEY_CTX_set_signature_md(ctx, md) <= 0) goto badarg; + } + + if (argv[0] == atom_rsa) { + if (EVP_PKEY_CTX_set_rsa_padding(ctx, sig_opt.rsa_padding) <= 0) goto badarg; +# ifdef HAVE_RSA_PKCS1_PSS_PADDING + if (sig_opt.rsa_padding == RSA_PKCS1_PSS_PADDING) { + if (sig_opt.rsa_mgf1_md != NULL) { +# ifdef HAVE_RSA_MGF1_MD + if (EVP_PKEY_CTX_set_rsa_mgf1_md(ctx, sig_opt.rsa_mgf1_md) <= 0) goto badarg; +# else + EVP_PKEY_CTX_free(ctx); + EVP_PKEY_free(pkey); + return atom_notsup; +# endif + } + if (sig_opt.rsa_pss_saltlen > -2 + && EVP_PKEY_CTX_set_rsa_pss_saltlen(ctx, sig_opt.rsa_pss_saltlen) <= 0) + goto badarg; + } +#endif + } + + if (argv[0] == atom_eddsa) { +#ifdef HAVE_EDDSA + EVP_MD_CTX* mdctx = EVP_MD_CTX_new(); + if (!EVP_DigestSignInit(mdctx, NULL, NULL, NULL, pkey)) { + if (mdctx) EVP_MD_CTX_free(mdctx); + goto badarg; + } + + if (!EVP_DigestSign(mdctx, NULL, &siglen, tbs, tbslen)) { + EVP_MD_CTX_free(mdctx); + goto badarg; + } + enif_alloc_binary(siglen, &sig_bin); + + if (!EVP_DigestSign(mdctx, sig_bin.data, &siglen, tbs, tbslen)) { + EVP_MD_CTX_free(mdctx); + goto badarg; + } + EVP_MD_CTX_free(mdctx); +#else + goto badarg; +#endif + } + else + { + if (EVP_PKEY_sign(ctx, NULL, &siglen, tbs, tbslen) <= 0) goto badarg; + enif_alloc_binary(siglen, &sig_bin); + + if (md != NULL) { + ERL_VALGRIND_ASSERT_MEM_DEFINED(tbs, EVP_MD_size(md)); + } + i = EVP_PKEY_sign(ctx, sig_bin.data, &siglen, tbs, tbslen); + } + + EVP_PKEY_CTX_free(ctx); +#else +/*printf("Old interface\r\n"); + */ + if (argv[0] == atom_rsa) { + RSA *rsa = EVP_PKEY_get1_RSA(pkey); + enif_alloc_binary(RSA_size(rsa), &sig_bin); + len = EVP_MD_size(md); + ERL_VALGRIND_ASSERT_MEM_DEFINED(tbs, len); + i = RSA_sign(md->type, tbs, len, sig_bin.data, &siglen, rsa); + RSA_free(rsa); + } else if (argv[0] == atom_dss) { + DSA *dsa = EVP_PKEY_get1_DSA(pkey); + enif_alloc_binary(DSA_size(dsa), &sig_bin); + len = EVP_MD_size(md); + ERL_VALGRIND_ASSERT_MEM_DEFINED(tbs, len); + i = DSA_sign(md->type, tbs, len, sig_bin.data, &siglen, dsa); + DSA_free(dsa); + } else if (argv[0] == atom_ecdsa) { +#if defined(HAVE_EC) + EC_KEY *ec = EVP_PKEY_get1_EC_KEY(pkey); + enif_alloc_binary(ECDSA_size(ec), &sig_bin); + len = EVP_MD_size(md); + ERL_VALGRIND_ASSERT_MEM_DEFINED(tbs, len); + i = ECDSA_sign(md->type, tbs, len, sig_bin.data, &siglen, ec); + EC_KEY_free(ec); +#else + EVP_PKEY_free(pkey); + return atom_notsup; +#endif + } else { + goto badarg; + } +#endif + + EVP_PKEY_free(pkey); + if (i == 1) { + ERL_VALGRIND_MAKE_MEM_DEFINED(sig_bin.data, siglen); + if (siglen != sig_bin.size) { + enif_realloc_binary(&sig_bin, siglen); + ERL_VALGRIND_ASSERT_MEM_DEFINED(sig_bin.data, siglen); + } + return enif_make_binary(env, &sig_bin); + } else { + enif_release_binary(&sig_bin); + return atom_error; + } + + badarg: +#ifdef HAS_EVP_PKEY_CTX + EVP_PKEY_CTX_free(ctx); +#endif + EVP_PKEY_free(pkey); + return enif_make_badarg(env); +} + +ERL_NIF_TERM pkey_verify_nif(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]) +{/* (Algorithm, Type, Data|{digest,Digest}, Signature, Key, Options) */ + int i; + const EVP_MD *md = NULL; + unsigned char md_value[EVP_MAX_MD_SIZE]; + EVP_PKEY *pkey; +#ifdef HAS_EVP_PKEY_CTX + EVP_PKEY_CTX *ctx; +#else +#endif + PKeySignOptions sig_opt; + ErlNifBinary sig_bin; /* signature */ + unsigned char *tbs; /* data to be signed */ + size_t tbslen; + +#ifndef HAS_ENGINE_SUPPORT + if (enif_is_map(env, argv[4])) { + return atom_notsup; + } +#endif + + if (!enif_inspect_binary(env, argv[3], &sig_bin)) { + return enif_make_badarg(env); + } + + i = get_pkey_sign_digest(env, argv[0], argv[1], argv[2], md_value, &md, &tbs, &tbslen); + if (i != PKEY_OK) { + if (i == PKEY_NOTSUP) + return atom_notsup; + else + return enif_make_badarg(env); + } + + i = get_pkey_sign_options(env, argv[0], argv[5], md, &sig_opt); + if (i != PKEY_OK) { + if (i == PKEY_NOTSUP) + return atom_notsup; + else + return enif_make_badarg(env); + } + + if (get_pkey_public_key(env, argv[0], argv[4], &pkey) != PKEY_OK) { + return enif_make_badarg(env); + } + +#ifdef HAS_EVP_PKEY_CTX +/* printf("EVP interface\r\n"); + */ + ctx = EVP_PKEY_CTX_new(pkey, NULL); + if (!ctx) goto badarg; + + if (argv[0] != atom_eddsa) { + if (EVP_PKEY_verify_init(ctx) <= 0) goto badarg; + if (md != NULL && EVP_PKEY_CTX_set_signature_md(ctx, md) <= 0) goto badarg; + } + + if (argv[0] == atom_rsa) { + if (EVP_PKEY_CTX_set_rsa_padding(ctx, sig_opt.rsa_padding) <= 0) goto badarg; + if (sig_opt.rsa_padding == RSA_PKCS1_PSS_PADDING) { + if (sig_opt.rsa_mgf1_md != NULL) { +# ifdef HAVE_RSA_MGF1_MD + if (EVP_PKEY_CTX_set_rsa_mgf1_md(ctx, sig_opt.rsa_mgf1_md) <= 0) goto badarg; +# else + EVP_PKEY_CTX_free(ctx); + EVP_PKEY_free(pkey); + return atom_notsup; +# endif + } + if (sig_opt.rsa_pss_saltlen > -2 + && EVP_PKEY_CTX_set_rsa_pss_saltlen(ctx, sig_opt.rsa_pss_saltlen) <= 0) + goto badarg; + } + } + + if (argv[0] == atom_eddsa) { +#ifdef HAVE_EDDSA + EVP_MD_CTX* mdctx = EVP_MD_CTX_create(); + + if (!EVP_DigestVerifyInit(mdctx, NULL, NULL, NULL, pkey)) { + if (mdctx) EVP_MD_CTX_destroy(mdctx); + goto badarg; + } + + i = EVP_DigestVerify(mdctx, sig_bin.data, sig_bin.size, tbs, tbslen); + EVP_MD_CTX_destroy(mdctx); +#else + goto badarg; +#endif + } + else + { + if (md != NULL) { + ERL_VALGRIND_ASSERT_MEM_DEFINED(tbs, EVP_MD_size(md)); + } + i = EVP_PKEY_verify(ctx, sig_bin.data, sig_bin.size, tbs, tbslen); + } + + EVP_PKEY_CTX_free(ctx); +#else +/*printf("Old interface\r\n"); +*/ + if (argv[0] == atom_rsa) { + RSA *rsa = EVP_PKEY_get1_RSA(pkey); + i = RSA_verify(md->type, tbs, tbslen, sig_bin.data, sig_bin.size, rsa); + RSA_free(rsa); + } else if (argv[0] == atom_dss) { + DSA *dsa = EVP_PKEY_get1_DSA(pkey); + i = DSA_verify(0, tbs, tbslen, sig_bin.data, sig_bin.size, dsa); + DSA_free(dsa); + } else if (argv[0] == atom_ecdsa) { +#if defined(HAVE_EC) + EC_KEY *ec = EVP_PKEY_get1_EC_KEY(pkey); + i = ECDSA_verify(EVP_MD_type(md), tbs, tbslen, sig_bin.data, sig_bin.size, ec); + EC_KEY_free(ec); +#else + EVP_PKEY_free(pkey); + return atom_notsup; +#endif + } else { + goto badarg; + } +#endif + + EVP_PKEY_free(pkey); + if (i == 1) { + return atom_true; + } else { + return atom_false; + } + + badarg: +#ifdef HAS_EVP_PKEY_CTX + EVP_PKEY_CTX_free(ctx); +#endif + EVP_PKEY_free(pkey); + return enif_make_badarg(env); +} + +static int get_pkey_crypt_options(ErlNifEnv *env, ERL_NIF_TERM algorithm, ERL_NIF_TERM options, + PKeyCryptOptions *opt) +{ + ERL_NIF_TERM head, tail; + const ERL_NIF_TERM *tpl_terms; + int tpl_arity; + const EVP_MD *opt_md; + int i; + + if (!enif_is_list(env, options)) { + return PKEY_BADARG; + } + + /* defaults */ + if (algorithm == atom_rsa) { + opt->rsa_mgf1_md = NULL; + opt->rsa_oaep_label.data = NULL; + opt->rsa_oaep_label.size = 0; + opt->rsa_oaep_md = NULL; + opt->rsa_padding = RSA_PKCS1_PADDING; + opt->signature_md = NULL; + } + + if (enif_is_empty_list(env, options)) { + return PKEY_OK; + } + + if (algorithm == atom_rsa) { + tail = options; + while (enif_get_list_cell(env, tail, &head, &tail)) { + if (enif_get_tuple(env, head, &tpl_arity, &tpl_terms) && tpl_arity == 2) { + if (tpl_terms[0] == atom_rsa_padding + || tpl_terms[0] == atom_rsa_pad /* Compatibility */ + ) { + if (tpl_terms[1] == atom_rsa_pkcs1_padding) { + opt->rsa_padding = RSA_PKCS1_PADDING; +#ifdef HAVE_RSA_OAEP_PADDING + } else if (tpl_terms[1] == atom_rsa_pkcs1_oaep_padding) { + opt->rsa_padding = RSA_PKCS1_OAEP_PADDING; +#endif +#ifdef HAVE_RSA_SSLV23_PADDING + } else if (tpl_terms[1] == atom_rsa_sslv23_padding) { + opt->rsa_padding = RSA_SSLV23_PADDING; +#endif + } else if (tpl_terms[1] == atom_rsa_x931_padding) { + opt->rsa_padding = RSA_X931_PADDING; + } else if (tpl_terms[1] == atom_rsa_no_padding) { + opt->rsa_padding = RSA_NO_PADDING; + } else { + return PKEY_BADARG; + } + } else if (tpl_terms[0] == atom_signature_md && enif_is_atom(env, tpl_terms[1])) { + i = get_pkey_digest_type(env, algorithm, tpl_terms[1], &opt_md); + if (i != PKEY_OK) { + return i; + } + opt->signature_md = opt_md; + } else if (tpl_terms[0] == atom_rsa_mgf1_md && enif_is_atom(env, tpl_terms[1])) { +#ifndef HAVE_RSA_MGF1_MD + if (tpl_terms[1] != atom_sha) + return PKEY_NOTSUP; +#endif + i = get_pkey_digest_type(env, algorithm, tpl_terms[1], &opt_md); + if (i != PKEY_OK) { + return i; + } + opt->rsa_mgf1_md = opt_md; + } else if (tpl_terms[0] == atom_rsa_oaep_label + && enif_inspect_binary(env, tpl_terms[1], &(opt->rsa_oaep_label))) { +#ifdef HAVE_RSA_OAEP_MD + continue; +#else + return PKEY_NOTSUP; +#endif + } else if (tpl_terms[0] == atom_rsa_oaep_md && enif_is_atom(env, tpl_terms[1])) { +#ifndef HAVE_RSA_OAEP_MD + if (tpl_terms[1] != atom_sha) + return PKEY_NOTSUP; +#endif + i = get_pkey_digest_type(env, algorithm, tpl_terms[1], &opt_md); + if (i != PKEY_OK) { + return i; + } + opt->rsa_oaep_md = opt_md; + } else { + return PKEY_BADARG; + } + } else { + return PKEY_BADARG; + } + } + } else { + return PKEY_BADARG; + } + + return PKEY_OK; +} + +static size_t size_of_RSA(EVP_PKEY *pkey) { + size_t tmplen; + RSA *rsa = EVP_PKEY_get1_RSA(pkey); + if (rsa == NULL) return 0; + tmplen = RSA_size(rsa); + RSA_free(rsa); + return tmplen; +} + +ERL_NIF_TERM pkey_crypt_nif(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]) +{/* (Algorithm, Data, PublKey=[E,N]|[E,N,D]|[E,N,D,P1,P2,E1,E2,C], Options, IsPrivate, IsEncrypt) */ + int i; + EVP_PKEY *pkey; +#ifdef HAS_EVP_PKEY_CTX + EVP_PKEY_CTX *ctx; +#else + RSA *rsa; +#endif + PKeyCryptOptions crypt_opt; + ErlNifBinary in_bin, out_bin, tmp_bin; + size_t outlen; +#ifdef HAVE_RSA_SSLV23_PADDING + size_t tmplen; +#endif + int is_private = (argv[4] == atom_true), + is_encrypt = (argv[5] == atom_true); + int algo_init = 0; + +/* char algo[1024]; */ + +#ifndef HAS_ENGINE_SUPPORT + if (enif_is_map(env, argv[2])) { + return atom_notsup; + } +#endif + + if (!enif_inspect_binary(env, argv[1], &in_bin)) { + return enif_make_badarg(env); + } + + i = get_pkey_crypt_options(env, argv[0], argv[3], &crypt_opt); + if (i != PKEY_OK) { + if (i == PKEY_NOTSUP) + return atom_notsup; + else + return enif_make_badarg(env); + } + + if (is_private) { + if (get_pkey_private_key(env, argv[0], argv[2], &pkey) != PKEY_OK) { + return enif_make_badarg(env); + } + } else { + if (get_pkey_public_key(env, argv[0], argv[2], &pkey) != PKEY_OK) { + return enif_make_badarg(env); + } + } + + out_bin.data = NULL; + out_bin.size = 0; + tmp_bin.data = NULL; + tmp_bin.size = 0; + +#ifdef HAS_EVP_PKEY_CTX + ctx = EVP_PKEY_CTX_new(pkey, NULL); + if (!ctx) goto badarg; + +/* enif_get_atom(env,argv[0],algo,1024,ERL_NIF_LATIN1); */ + + if (is_private) { + if (is_encrypt) { + /* private encrypt */ + if ((algo_init=EVP_PKEY_sign_init(ctx)) <= 0) { + /* fprintf(stderr,"BADARG %s private encrypt algo_init=%d %s:%d\r\n", algo, algo_init, __FILE__, __LINE__); */ + goto badarg; + } + } else { + /* private decrypt */ + if ((algo_init=EVP_PKEY_decrypt_init(ctx)) <= 0) { + /* fprintf(stderr,"BADARG %s private decrypt algo_init=%d %s:%d\r\n", algo, algo_init, __FILE__, __LINE__); */ + goto badarg; + } + } + } else { + if (is_encrypt) { + /* public encrypt */ + if ((algo_init=EVP_PKEY_encrypt_init(ctx)) <= 0) { + /* fprintf(stderr,"BADARG %s public encrypt algo_init=%d %s:%d\r\n", algo,algo_init,__FILE__, __LINE__); */ + goto badarg; + } + } else { + /* public decrypt */ + if ((algo_init=EVP_PKEY_verify_recover_init(ctx)) <= 0) { + /* fprintf(stderr,"BADARG %s public decrypt algo_init=%d %s:%d\r\n", algo,algo_init,__FILE__, __LINE__); */ + goto badarg; + } + } + } + + if (argv[0] == atom_rsa) { + if (crypt_opt.signature_md != NULL + && EVP_PKEY_CTX_set_signature_md(ctx, crypt_opt.signature_md) <= 0) + goto badarg; +#ifdef HAVE_RSA_SSLV23_PADDING + if (crypt_opt.rsa_padding == RSA_SSLV23_PADDING) { + if (is_encrypt) { + tmplen = size_of_RSA(pkey); + if (tmplen == 0) goto badarg; + if (!enif_alloc_binary(tmplen, &tmp_bin)) goto badarg; + if (RSA_padding_add_SSLv23(tmp_bin.data, tmplen, in_bin.data, in_bin.size) <= 0) + goto badarg; + in_bin = tmp_bin; + } + if (EVP_PKEY_CTX_set_rsa_padding(ctx, RSA_NO_PADDING) <= 0) goto badarg; + } else +#endif + { + if (EVP_PKEY_CTX_set_rsa_padding(ctx, crypt_opt.rsa_padding) <= 0) goto badarg; + } +#ifdef HAVE_RSA_OAEP_MD + if (crypt_opt.rsa_padding == RSA_PKCS1_OAEP_PADDING) { + if (crypt_opt.rsa_oaep_md != NULL + && EVP_PKEY_CTX_set_rsa_oaep_md(ctx, crypt_opt.rsa_oaep_md) <= 0) + goto badarg; + if (crypt_opt.rsa_mgf1_md != NULL + && EVP_PKEY_CTX_set_rsa_mgf1_md(ctx, crypt_opt.rsa_mgf1_md) <= 0) goto badarg; + if (crypt_opt.rsa_oaep_label.data != NULL && crypt_opt.rsa_oaep_label.size > 0) { + unsigned char *label_copy = NULL; + label_copy = OPENSSL_malloc(crypt_opt.rsa_oaep_label.size); + if (label_copy == NULL) goto badarg; + memcpy((void *)(label_copy), (const void *)(crypt_opt.rsa_oaep_label.data), + crypt_opt.rsa_oaep_label.size); + if (EVP_PKEY_CTX_set0_rsa_oaep_label(ctx, label_copy, + crypt_opt.rsa_oaep_label.size) <= 0) { + OPENSSL_free(label_copy); + label_copy = NULL; + goto badarg; + } + } + } +#endif + } + + if (is_private) { + if (is_encrypt) { + /* private_encrypt */ + i = EVP_PKEY_sign(ctx, NULL, &outlen, in_bin.data, in_bin.size); + } else { + /* private_decrypt */ + i = EVP_PKEY_decrypt(ctx, NULL, &outlen, in_bin.data, in_bin.size); + } + } else { + if (is_encrypt) { + /* public_encrypt */ + i = EVP_PKEY_encrypt(ctx, NULL, &outlen, in_bin.data, in_bin.size); + } else { + /* public_decrypt */ + i = EVP_PKEY_verify_recover(ctx, NULL, &outlen, in_bin.data, in_bin.size); + } + } + /* fprintf(stderr,"i = %d %s:%d\r\n", i, __FILE__, __LINE__); */ + + if (i != 1) goto badarg; + + enif_alloc_binary(outlen, &out_bin); + + if (is_private) { + if (is_encrypt) { + /* private_encrypt */ + i = EVP_PKEY_sign(ctx, out_bin.data, &outlen, in_bin.data, in_bin.size); + } else { + /* private_decrypt */ + i = EVP_PKEY_decrypt(ctx, out_bin.data, &outlen, in_bin.data, in_bin.size); + } + } else { + if (is_encrypt) { + /* public_encrypt */ + i = EVP_PKEY_encrypt(ctx, out_bin.data, &outlen, in_bin.data, in_bin.size); + } else { + /* public_decrypt */ + i = EVP_PKEY_verify_recover(ctx, out_bin.data, &outlen, in_bin.data, in_bin.size); + } + } + +#else + /* Non-EVP cryptolib. Only support RSA */ + + if (argv[0] != atom_rsa) { + algo_init = -2; /* exitcode: notsup */ + goto badarg; + } + rsa = EVP_PKEY_get1_RSA(pkey); + enif_alloc_binary(RSA_size(rsa), &out_bin); + + if (is_private) { + if (is_encrypt) { + /* non-evp rsa private encrypt */ + ERL_VALGRIND_ASSERT_MEM_DEFINED(in_bin.data,in_bin.size); + i = RSA_private_encrypt(in_bin.size, in_bin.data, + out_bin.data, rsa, crypt_opt.rsa_padding); + if (i > 0) { + ERL_VALGRIND_MAKE_MEM_DEFINED(out_bin.data, i); + } + } else { + /* non-evp rsa private decrypt */ + i = RSA_private_decrypt(in_bin.size, in_bin.data, + out_bin.data, rsa, crypt_opt.rsa_padding); + if (i > 0) { + ERL_VALGRIND_MAKE_MEM_DEFINED(out_bin.data, i); + enif_realloc_binary(&out_bin, i); + } + } + } else { + if (is_encrypt) { + /* non-evp rsa public encrypt */ + ERL_VALGRIND_ASSERT_MEM_DEFINED(in_bin.data,in_bin.size); + i = RSA_public_encrypt(in_bin.size, in_bin.data, + out_bin.data, rsa, crypt_opt.rsa_padding); + if (i > 0) { + ERL_VALGRIND_MAKE_MEM_DEFINED(out_bin.data, i); + } + } else { + /* non-evp rsa public decrypt */ + i = RSA_public_decrypt(in_bin.size, in_bin.data, + out_bin.data, rsa, crypt_opt.rsa_padding); + if (i > 0) { + ERL_VALGRIND_MAKE_MEM_DEFINED(out_bin.data, i); + enif_realloc_binary(&out_bin, i); + } + } + } + + outlen = i; + RSA_free(rsa); +#endif + + if ((i > 0) && argv[0] == atom_rsa && !is_encrypt) { +#ifdef HAVE_RSA_SSLV23_PADDING + if (crypt_opt.rsa_padding == RSA_SSLV23_PADDING) { + unsigned char *p; + tmplen = size_of_RSA(pkey); + if (tmplen == 0) goto badarg; + if (!enif_alloc_binary(tmplen, &tmp_bin)) + goto badarg; + p = out_bin.data; + p++; + i = RSA_padding_check_SSLv23(tmp_bin.data, tmplen, p, out_bin.size - 1, tmplen); + if (i >= 0) { + outlen = i; + in_bin = out_bin; + out_bin = tmp_bin; + tmp_bin = in_bin; + i = 1; + } + } +#endif + } + + if (tmp_bin.data != NULL) { + enif_release_binary(&tmp_bin); + } + +#ifdef HAS_EVP_PKEY_CTX + EVP_PKEY_CTX_free(ctx); +#else +#endif + EVP_PKEY_free(pkey); + if (i > 0) { + ERL_VALGRIND_MAKE_MEM_DEFINED(out_bin.data, outlen); + if (outlen != out_bin.size) { + enif_realloc_binary(&out_bin, outlen); + ERL_VALGRIND_ASSERT_MEM_DEFINED(out_bin.data, outlen); + } + return enif_make_binary(env, &out_bin); + } else { + enif_release_binary(&out_bin); + return atom_error; + } + + badarg: + if (out_bin.data != NULL) { + enif_release_binary(&out_bin); + } + if (tmp_bin.data != NULL) { + enif_release_binary(&tmp_bin); + } +#ifdef HAS_EVP_PKEY_CTX + EVP_PKEY_CTX_free(ctx); +#else +#endif + EVP_PKEY_free(pkey); + if (algo_init == -2) + return atom_notsup; + else + return enif_make_badarg(env); +} + +ERL_NIF_TERM privkey_to_pubkey_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]) +{ /* (Algorithm, PrivKey | KeyMap) */ + EVP_PKEY *pkey; + ERL_NIF_TERM alg = argv[0]; + ERL_NIF_TERM result[8]; + if (get_pkey_private_key(env, alg, argv[1], &pkey) != PKEY_OK) { + return enif_make_badarg(env); + } + + if (alg == atom_rsa) { + const BIGNUM *n = NULL, *e = NULL, *d = NULL; + RSA *rsa = EVP_PKEY_get1_RSA(pkey); + if (rsa) { + RSA_get0_key(rsa, &n, &e, &d); + result[0] = bin_from_bn(env, e); // Exponent E + result[1] = bin_from_bn(env, n); // Modulus N = p*q + RSA_free(rsa); + EVP_PKEY_free(pkey); + return enif_make_list_from_array(env, result, 2); + } + + } else if (argv[0] == atom_dss) { + const BIGNUM *p = NULL, *q = NULL, *g = NULL, *pub_key = NULL; + DSA *dsa = EVP_PKEY_get1_DSA(pkey); + if (dsa) { + DSA_get0_pqg(dsa, &p, &q, &g); + DSA_get0_key(dsa, &pub_key, NULL); + result[0] = bin_from_bn(env, p); + result[1] = bin_from_bn(env, q); + result[2] = bin_from_bn(env, g); + result[3] = bin_from_bn(env, pub_key); + DSA_free(dsa); + EVP_PKEY_free(pkey); + return enif_make_list_from_array(env, result, 4); + } + + } else if (argv[0] == atom_ecdsa) { +#if defined(HAVE_EC) + /* not yet implemented + EC_KEY *ec = EVP_PKEY_get1_EC_KEY(pkey); + if (ec) { + / * Example of result: + { + Curve = {Field, Prime, Point, Order, CoFactor} = + { + Field = {prime_field,<<255,...,255>>}, + Prime = {<<255,...,252>>, + <<90,...,75>>, + <<196,...,144>> + }, + Point = <<4,...,245>>, + Order = <<255,...,81>>, + CoFactor = <<1>> + }, + Key = <<151,...,62>> + } + or + { + Curve = + {characteristic_two_field, + M, + Basis = {tpbasis, _} + | {ppbasis, k1, k2, k3} + }, + Key + } + * / + EVP_PKEY_free(pkey); + return enif_make_list_from_array(env, ..., ...); + */ +#endif + } + + if (pkey) EVP_PKEY_free(pkey); + return enif_make_badarg(env); +} |