diff options
Diffstat (limited to 'src/libcryptobox/keypair.c')
| -rw-r--r-- | src/libcryptobox/keypair.c | 1021 |
1 files changed, 1021 insertions, 0 deletions
diff --git a/src/libcryptobox/keypair.c b/src/libcryptobox/keypair.c new file mode 100644 index 0000000..ec7490a --- /dev/null +++ b/src/libcryptobox/keypair.c @@ -0,0 +1,1021 @@ +/*- + * Copyright 2016 Vsevolod Stakhov + * + * 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. + */ + +#include "config.h" +#include "libcryptobox/keypair.h" +#include "libcryptobox/keypair_private.h" +#include "libutil/str_util.h" +#include "libutil/printf.h" +#include "contrib/libottery/ottery.h" + +const guchar encrypted_magic[7] = {'r', 'u', 'c', 'l', 'e', 'v', '1'}; + +static GQuark +rspamd_keypair_quark(void) +{ + return g_quark_from_static_string("rspamd-cryptobox-keypair"); +} + +/** + * Returns specific private key for different keypair types + */ +static void * +rspamd_cryptobox_keypair_sk(struct rspamd_cryptobox_keypair *kp, + guint *len) +{ + g_assert(kp != NULL); + + if (kp->alg == RSPAMD_CRYPTOBOX_MODE_25519) { + if (kp->type == RSPAMD_KEYPAIR_KEX) { + *len = 32; + return RSPAMD_CRYPTOBOX_KEYPAIR_25519(kp)->sk; + } + else { + *len = 64; + return RSPAMD_CRYPTOBOX_KEYPAIR_SIG_25519(kp)->sk; + } + } + else { + if (kp->type == RSPAMD_KEYPAIR_KEX) { + *len = 32; + return RSPAMD_CRYPTOBOX_KEYPAIR_NIST(kp)->sk; + } + else { + *len = 32; + return RSPAMD_CRYPTOBOX_KEYPAIR_SIG_NIST(kp)->sk; + } + } + + /* Not reached */ + return NULL; +} + +static void * +rspamd_cryptobox_keypair_pk(struct rspamd_cryptobox_keypair *kp, + guint *len) +{ + g_assert(kp != NULL); + + if (kp->alg == RSPAMD_CRYPTOBOX_MODE_25519) { + if (kp->type == RSPAMD_KEYPAIR_KEX) { + *len = 32; + return RSPAMD_CRYPTOBOX_KEYPAIR_25519(kp)->pk; + } + else { + *len = 32; + return RSPAMD_CRYPTOBOX_KEYPAIR_SIG_25519(kp)->pk; + } + } + else { + if (kp->type == RSPAMD_KEYPAIR_KEX) { + *len = 65; + return RSPAMD_CRYPTOBOX_KEYPAIR_NIST(kp)->pk; + } + else { + *len = 65; + return RSPAMD_CRYPTOBOX_KEYPAIR_SIG_NIST(kp)->pk; + } + } + + /* Not reached */ + return NULL; +} + +static void * +rspamd_cryptobox_pubkey_pk(const struct rspamd_cryptobox_pubkey *kp, + guint *len) +{ + g_assert(kp != NULL); + + if (kp->alg == RSPAMD_CRYPTOBOX_MODE_25519) { + if (kp->type == RSPAMD_KEYPAIR_KEX) { + *len = 32; + return RSPAMD_CRYPTOBOX_PUBKEY_25519(kp)->pk; + } + else { + *len = 32; + return RSPAMD_CRYPTOBOX_PUBKEY_SIG_25519(kp)->pk; + } + } + else { + if (kp->type == RSPAMD_KEYPAIR_KEX) { + *len = 65; + return RSPAMD_CRYPTOBOX_PUBKEY_NIST(kp)->pk; + } + else { + *len = 65; + return RSPAMD_CRYPTOBOX_PUBKEY_SIG_NIST(kp)->pk; + } + } + + /* Not reached */ + return NULL; +} + +static struct rspamd_cryptobox_keypair * +rspamd_cryptobox_keypair_alloc(enum rspamd_cryptobox_keypair_type type, + enum rspamd_cryptobox_mode alg) +{ + struct rspamd_cryptobox_keypair *kp; + guint size = 0; + + if (alg == RSPAMD_CRYPTOBOX_MODE_25519) { + if (type == RSPAMD_KEYPAIR_KEX) { + size = sizeof(struct rspamd_cryptobox_keypair_25519); + } + else { + size = sizeof(struct rspamd_cryptobox_keypair_sig_25519); + } + } + else { + if (type == RSPAMD_KEYPAIR_KEX) { + size = sizeof(struct rspamd_cryptobox_keypair_nist); + } + else { + size = sizeof(struct rspamd_cryptobox_keypair_sig_nist); + } + } + + g_assert(size >= sizeof(*kp)); + + if (posix_memalign((void **) &kp, 32, size) != 0) { + abort(); + } + + memset(kp, 0, size); + + return kp; +} + +static struct rspamd_cryptobox_pubkey * +rspamd_cryptobox_pubkey_alloc(enum rspamd_cryptobox_keypair_type type, + enum rspamd_cryptobox_mode alg) +{ + struct rspamd_cryptobox_pubkey *pk; + guint size = 0; + + if (alg == RSPAMD_CRYPTOBOX_MODE_25519) { + if (type == RSPAMD_KEYPAIR_KEX) { + size = sizeof(struct rspamd_cryptobox_pubkey_25519); + } + else { + size = sizeof(struct rspamd_cryptobox_pubkey_sig_25519); + } + } + else { + if (type == RSPAMD_KEYPAIR_KEX) { + size = sizeof(struct rspamd_cryptobox_pubkey_nist); + } + else { + size = sizeof(struct rspamd_cryptobox_pubkey_sig_nist); + } + } + + g_assert(size >= sizeof(*pk)); + + if (posix_memalign((void **) &pk, 32, size) != 0) { + abort(); + } + + memset(pk, 0, size); + + return pk; +} + + +void rspamd_cryptobox_nm_dtor(struct rspamd_cryptobox_nm *nm) +{ + rspamd_explicit_memzero(nm->nm, sizeof(nm->nm)); + free(nm); +} + +void rspamd_cryptobox_keypair_dtor(struct rspamd_cryptobox_keypair *kp) +{ + void *sk; + guint len = 0; + + sk = rspamd_cryptobox_keypair_sk(kp, &len); + g_assert(sk != NULL && len > 0); + rspamd_explicit_memzero(sk, len); + + if (kp->extensions) { + ucl_object_unref(kp->extensions); + } + + /* Not g_free as kp is aligned using posix_memalign */ + free(kp); +} + +void rspamd_cryptobox_pubkey_dtor(struct rspamd_cryptobox_pubkey *p) +{ + if (p->nm) { + REF_RELEASE(p->nm); + } + + /* Not g_free as p is aligned using posix_memalign */ + free(p); +} + +struct rspamd_cryptobox_keypair * +rspamd_keypair_new(enum rspamd_cryptobox_keypair_type type, + enum rspamd_cryptobox_mode alg) +{ + struct rspamd_cryptobox_keypair *kp; + void *pk, *sk; + guint size; + + kp = rspamd_cryptobox_keypair_alloc(type, alg); + kp->alg = alg; + kp->type = type; + + sk = rspamd_cryptobox_keypair_sk(kp, &size); + pk = rspamd_cryptobox_keypair_pk(kp, &size); + + if (type == RSPAMD_KEYPAIR_KEX) { + rspamd_cryptobox_keypair(pk, sk, alg); + } + else { + rspamd_cryptobox_keypair_sig(pk, sk, alg); + } + + rspamd_cryptobox_hash(kp->id, pk, size, NULL, 0); + + REF_INIT_RETAIN(kp, rspamd_cryptobox_keypair_dtor); + + return kp; +} + + +struct rspamd_cryptobox_keypair * +rspamd_keypair_ref(struct rspamd_cryptobox_keypair *kp) +{ + REF_RETAIN(kp); + return kp; +} + + +void rspamd_keypair_unref(struct rspamd_cryptobox_keypair *kp) +{ + REF_RELEASE(kp); +} + + +struct rspamd_cryptobox_pubkey * +rspamd_pubkey_ref(struct rspamd_cryptobox_pubkey *kp) +{ + REF_RETAIN(kp); + return kp; +} + +void rspamd_pubkey_unref(struct rspamd_cryptobox_pubkey *kp) +{ + REF_RELEASE(kp); +} + +enum rspamd_cryptobox_keypair_type +rspamd_keypair_type(struct rspamd_cryptobox_keypair *kp) +{ + g_assert(kp != NULL); + + return kp->type; +} + +enum rspamd_cryptobox_keypair_type +rspamd_pubkey_type(struct rspamd_cryptobox_pubkey *p) +{ + g_assert(p != NULL); + + return p->type; +} + + +enum rspamd_cryptobox_mode +rspamd_keypair_alg(struct rspamd_cryptobox_keypair *kp) +{ + g_assert(kp != NULL); + + return kp->alg; +} + +enum rspamd_cryptobox_mode +rspamd_pubkey_alg(struct rspamd_cryptobox_pubkey *p) +{ + g_assert(p != NULL); + + return p->alg; +} + +struct rspamd_cryptobox_pubkey * +rspamd_pubkey_from_base32(const gchar *b32, + gsize len, + enum rspamd_cryptobox_keypair_type type, + enum rspamd_cryptobox_mode alg) +{ + guchar *decoded; + gsize dlen, expected_len; + guint pklen; + struct rspamd_cryptobox_pubkey *pk; + guchar *pk_data; + + g_assert(b32 != NULL); + + if (len == 0) { + len = strlen(b32); + } + + decoded = rspamd_decode_base32(b32, len, &dlen, RSPAMD_BASE32_DEFAULT); + + if (decoded == NULL) { + return NULL; + } + + expected_len = (type == RSPAMD_KEYPAIR_KEX) ? rspamd_cryptobox_pk_bytes(alg) : rspamd_cryptobox_pk_sig_bytes(alg); + + if (dlen != expected_len) { + g_free(decoded); + return NULL; + } + + pk = rspamd_cryptobox_pubkey_alloc(type, alg); + REF_INIT_RETAIN(pk, rspamd_cryptobox_pubkey_dtor); + pk->alg = alg; + pk->type = type; + pk_data = rspamd_cryptobox_pubkey_pk(pk, &pklen); + + memcpy(pk_data, decoded, pklen); + g_free(decoded); + rspamd_cryptobox_hash(pk->id, pk_data, pklen, NULL, 0); + + return pk; +} + +struct rspamd_cryptobox_pubkey * +rspamd_pubkey_from_hex(const gchar *hex, + gsize len, + enum rspamd_cryptobox_keypair_type type, + enum rspamd_cryptobox_mode alg) +{ + guchar *decoded; + gsize dlen, expected_len; + guint pklen; + struct rspamd_cryptobox_pubkey *pk; + guchar *pk_data; + + g_assert(hex != NULL); + + if (len == 0) { + len = strlen(hex); + } + + dlen = len / 2; + + decoded = rspamd_decode_hex(hex, len); + + if (decoded == NULL) { + return NULL; + } + + expected_len = (type == RSPAMD_KEYPAIR_KEX) ? rspamd_cryptobox_pk_bytes(alg) : rspamd_cryptobox_pk_sig_bytes(alg); + + if (dlen != expected_len) { + g_free(decoded); + return NULL; + } + + pk = rspamd_cryptobox_pubkey_alloc(type, alg); + REF_INIT_RETAIN(pk, rspamd_cryptobox_pubkey_dtor); + pk->alg = alg; + pk->type = type; + pk_data = rspamd_cryptobox_pubkey_pk(pk, &pklen); + + memcpy(pk_data, decoded, pklen); + g_free(decoded); + rspamd_cryptobox_hash(pk->id, pk_data, pklen, NULL, 0); + + return pk; +} + +struct rspamd_cryptobox_pubkey * +rspamd_pubkey_from_bin(const guchar *raw, + gsize len, + enum rspamd_cryptobox_keypair_type type, + enum rspamd_cryptobox_mode alg) +{ + gsize expected_len; + guint pklen; + struct rspamd_cryptobox_pubkey *pk; + guchar *pk_data; + + g_assert(raw != NULL && len > 0); + + expected_len = (type == RSPAMD_KEYPAIR_KEX) ? rspamd_cryptobox_pk_bytes(alg) : rspamd_cryptobox_pk_sig_bytes(alg); + + if (len != expected_len) { + return NULL; + } + + pk = rspamd_cryptobox_pubkey_alloc(type, alg); + REF_INIT_RETAIN(pk, rspamd_cryptobox_pubkey_dtor); + pk->alg = alg; + pk->type = type; + pk_data = rspamd_cryptobox_pubkey_pk(pk, &pklen); + + memcpy(pk_data, raw, pklen); + rspamd_cryptobox_hash(pk->id, pk_data, pklen, NULL, 0); + + return pk; +} + + +const guchar * +rspamd_pubkey_get_nm(struct rspamd_cryptobox_pubkey *p, + struct rspamd_cryptobox_keypair *kp) +{ + g_assert(p != NULL); + + if (p->nm) { + if (memcmp(kp->id, (const guchar *) &p->nm->sk_id, sizeof(guint64)) == 0) { + return p->nm->nm; + } + + /* Wrong ID, need to recalculate */ + REF_RELEASE(p->nm); + p->nm = NULL; + } + + return NULL; +} + +const guchar * +rspamd_pubkey_calculate_nm(struct rspamd_cryptobox_pubkey *p, + struct rspamd_cryptobox_keypair *kp) +{ + g_assert(kp->alg == p->alg); + g_assert(kp->type == p->type); + g_assert(p->type == RSPAMD_KEYPAIR_KEX); + + if (p->nm == NULL) { + if (posix_memalign((void **) &p->nm, 32, sizeof(*p->nm)) != 0) { + abort(); + } + + memcpy(&p->nm->sk_id, kp->id, sizeof(guint64)); + REF_INIT_RETAIN(p->nm, rspamd_cryptobox_nm_dtor); + } + + if (kp->alg == RSPAMD_CRYPTOBOX_MODE_25519) { + struct rspamd_cryptobox_pubkey_25519 *rk_25519 = + RSPAMD_CRYPTOBOX_PUBKEY_25519(p); + struct rspamd_cryptobox_keypair_25519 *sk_25519 = + RSPAMD_CRYPTOBOX_KEYPAIR_25519(kp); + + rspamd_cryptobox_nm(p->nm->nm, rk_25519->pk, sk_25519->sk, p->alg); + } + else { + struct rspamd_cryptobox_pubkey_nist *rk_nist = + RSPAMD_CRYPTOBOX_PUBKEY_NIST(p); + struct rspamd_cryptobox_keypair_nist *sk_nist = + RSPAMD_CRYPTOBOX_KEYPAIR_NIST(kp); + + rspamd_cryptobox_nm(p->nm->nm, rk_nist->pk, sk_nist->sk, p->alg); + } + + return p->nm->nm; +} + +const guchar * +rspamd_keypair_get_id(struct rspamd_cryptobox_keypair *kp) +{ + g_assert(kp != NULL); + + return kp->id; +} + +const ucl_object_t * +rspamd_keypair_get_extensions(struct rspamd_cryptobox_keypair *kp) +{ + g_assert(kp != NULL); + + return kp->extensions; +} + +const guchar * +rspamd_pubkey_get_id(struct rspamd_cryptobox_pubkey *pk) +{ + g_assert(pk != NULL); + + return pk->id; +} + +const guchar * +rspamd_pubkey_get_pk(struct rspamd_cryptobox_pubkey *pk, + guint *len) +{ + guchar *ret = NULL; + guint rlen; + + ret = rspamd_cryptobox_pubkey_pk(pk, &rlen); + + if (len) { + *len = rlen; + } + + return ret; +} + +static void +rspamd_keypair_print_component(guchar *data, gsize datalen, + GString *res, guint how, const gchar *description) +{ + gint olen, b32_len; + + if (how & RSPAMD_KEYPAIR_HUMAN) { + rspamd_printf_gstring(res, "%s: ", description); + } + + if (how & RSPAMD_KEYPAIR_BASE32) { + b32_len = (datalen * 8 / 5) + 2; + g_string_set_size(res, res->len + b32_len); + res->len -= b32_len; + olen = rspamd_encode_base32_buf(data, datalen, res->str + res->len, + res->len + b32_len - 1, RSPAMD_BASE32_DEFAULT); + + if (olen > 0) { + res->len += olen; + res->str[res->len] = '\0'; + } + } + else if (how & RSPAMD_KEYPAIR_HEX) { + rspamd_printf_gstring(res, "%*xs", (gint) datalen, data); + } + else { + g_string_append_len(res, data, datalen); + } + + if (how & RSPAMD_KEYPAIR_HUMAN) { + g_string_append_c(res, '\n'); + } +} + +GString * +rspamd_keypair_print(struct rspamd_cryptobox_keypair *kp, guint how) +{ + GString *res; + guint len; + gpointer p; + + g_assert(kp != NULL); + + res = g_string_sized_new(63); + + if ((how & RSPAMD_KEYPAIR_PUBKEY)) { + p = rspamd_cryptobox_keypair_pk(kp, &len); + rspamd_keypair_print_component(p, len, res, how, "Public key"); + } + if ((how & RSPAMD_KEYPAIR_PRIVKEY)) { + p = rspamd_cryptobox_keypair_sk(kp, &len); + rspamd_keypair_print_component(p, len, res, how, "Private key"); + } + if ((how & RSPAMD_KEYPAIR_ID_SHORT)) { + rspamd_keypair_print_component(kp->id, RSPAMD_KEYPAIR_SHORT_ID_LEN, + res, how, "Short key ID"); + } + if ((how & RSPAMD_KEYPAIR_ID)) { + rspamd_keypair_print_component(kp->id, sizeof(kp->id), res, how, "Key ID"); + } + + return res; +} + +GString * +rspamd_pubkey_print(struct rspamd_cryptobox_pubkey *pk, guint how) +{ + GString *res; + guint len; + gpointer p; + + g_assert(pk != NULL); + + res = g_string_sized_new(63); + + if ((how & RSPAMD_KEYPAIR_PUBKEY)) { + p = rspamd_cryptobox_pubkey_pk(pk, &len); + rspamd_keypair_print_component(p, len, res, how, "Public key"); + } + if ((how & RSPAMD_KEYPAIR_ID_SHORT)) { + rspamd_keypair_print_component(pk->id, RSPAMD_KEYPAIR_SHORT_ID_LEN, + res, how, "Short key ID"); + } + if ((how & RSPAMD_KEYPAIR_ID)) { + rspamd_keypair_print_component(pk->id, sizeof(pk->id), res, how, + "Key ID"); + } + + return res; +} + +const guchar * +rspamd_keypair_component(struct rspamd_cryptobox_keypair *kp, + guint ncomp, guint *len) +{ + guint rlen = 0; + const guchar *ret = NULL; + + g_assert(kp != NULL); + + switch (ncomp) { + case RSPAMD_KEYPAIR_COMPONENT_ID: + rlen = sizeof(kp->id); + ret = kp->id; + break; + case RSPAMD_KEYPAIR_COMPONENT_PK: + ret = rspamd_cryptobox_keypair_pk(kp, &rlen); + break; + case RSPAMD_KEYPAIR_COMPONENT_SK: + ret = rspamd_cryptobox_keypair_sk(kp, &rlen); + break; + } + + if (len) { + *len = rlen; + } + + return ret; +} + +struct rspamd_cryptobox_keypair * +rspamd_keypair_from_ucl(const ucl_object_t *obj) +{ + const ucl_object_t *privkey, *pubkey, *elt; + const gchar *str; + enum rspamd_cryptobox_keypair_type type = RSPAMD_KEYPAIR_KEX; + enum rspamd_cryptobox_mode mode = RSPAMD_CRYPTOBOX_MODE_25519; + gboolean is_hex = FALSE; + struct rspamd_cryptobox_keypair *kp; + guint len; + gsize ucl_len; + gint dec_len; + gpointer target; + + if (ucl_object_type(obj) != UCL_OBJECT) { + return NULL; + } + + elt = ucl_object_lookup(obj, "keypair"); + if (elt != NULL) { + obj = elt; + } + + pubkey = ucl_object_lookup_any(obj, "pubkey", "public", "public_key", + NULL); + if (pubkey == NULL || ucl_object_type(pubkey) != UCL_STRING) { + return NULL; + } + + privkey = ucl_object_lookup_any(obj, "privkey", "private", "private_key", + "secret", "secret_key", NULL); + if (privkey == NULL || ucl_object_type(privkey) != UCL_STRING) { + return NULL; + } + + /* Optional fields */ + elt = ucl_object_lookup(obj, "type"); + if (elt && ucl_object_type(elt) == UCL_STRING) { + str = ucl_object_tostring(elt); + + if (g_ascii_strcasecmp(str, "kex") == 0) { + type = RSPAMD_KEYPAIR_KEX; + } + else if (g_ascii_strcasecmp(str, "sign") == 0) { + type = RSPAMD_KEYPAIR_SIGN; + } + /* TODO: handle errors */ + } + + elt = ucl_object_lookup(obj, "algorithm"); + if (elt && ucl_object_type(elt) == UCL_STRING) { + str = ucl_object_tostring(elt); + + if (g_ascii_strcasecmp(str, "curve25519") == 0) { + mode = RSPAMD_CRYPTOBOX_MODE_25519; + } + else if (g_ascii_strcasecmp(str, "nistp256") == 0) { + mode = RSPAMD_CRYPTOBOX_MODE_NIST; + } + /* TODO: handle errors */ + } + + elt = ucl_object_lookup(obj, "encoding"); + if (elt && ucl_object_type(elt) == UCL_STRING) { + str = ucl_object_tostring(elt); + + if (g_ascii_strcasecmp(str, "hex") == 0) { + is_hex = TRUE; + } + /* TODO: handle errors */ + } + + kp = rspamd_cryptobox_keypair_alloc(type, mode); + kp->type = type; + kp->alg = mode; + REF_INIT_RETAIN(kp, rspamd_cryptobox_keypair_dtor); + g_assert(kp != NULL); + + target = rspamd_cryptobox_keypair_sk(kp, &len); + str = ucl_object_tolstring(privkey, &ucl_len); + + if (is_hex) { + dec_len = rspamd_decode_hex_buf(str, ucl_len, target, len); + } + else { + dec_len = rspamd_decode_base32_buf(str, ucl_len, target, len, RSPAMD_BASE32_DEFAULT); + } + + if (dec_len != (gint) len) { + rspamd_keypair_unref(kp); + + return NULL; + } + + target = rspamd_cryptobox_keypair_pk(kp, &len); + str = ucl_object_tolstring(pubkey, &ucl_len); + + if (is_hex) { + dec_len = rspamd_decode_hex_buf(str, ucl_len, target, len); + } + else { + dec_len = rspamd_decode_base32_buf(str, ucl_len, target, len, RSPAMD_BASE32_DEFAULT); + } + + if (dec_len != (gint) len) { + rspamd_keypair_unref(kp); + + return NULL; + } + + rspamd_cryptobox_hash(kp->id, target, len, NULL, 0); + + elt = ucl_object_lookup(obj, "extensions"); + if (elt && ucl_object_type(elt) == UCL_OBJECT) { + /* Use copy to avoid issues with the refcounts */ + kp->extensions = ucl_object_copy(elt); + } + + return kp; +} + +ucl_object_t * +rspamd_keypair_to_ucl(struct rspamd_cryptobox_keypair *kp, + enum rspamd_keypair_dump_flags flags) +{ + ucl_object_t *ucl_out, *elt; + gint how = 0; + GString *keypair_out; + const gchar *encoding; + + g_assert(kp != NULL); + + if (flags & RSPAMD_KEYPAIR_DUMP_HEX) { + how |= RSPAMD_KEYPAIR_HEX; + encoding = "hex"; + } + else { + how |= RSPAMD_KEYPAIR_BASE32; + encoding = "base32"; + } + + if (flags & RSPAMD_KEYPAIR_DUMP_FLATTENED) { + ucl_out = ucl_object_typed_new(UCL_OBJECT); + elt = ucl_out; + } + else { + ucl_out = ucl_object_typed_new(UCL_OBJECT); + elt = ucl_object_typed_new(UCL_OBJECT); + ucl_object_insert_key(ucl_out, elt, "keypair", 0, false); + } + + + /* pubkey part */ + keypair_out = rspamd_keypair_print(kp, + RSPAMD_KEYPAIR_PUBKEY | how); + ucl_object_insert_key(elt, + ucl_object_fromlstring(keypair_out->str, keypair_out->len), + "pubkey", 0, false); + g_string_free(keypair_out, TRUE); + + if (!(flags & RSPAMD_KEYPAIR_DUMP_NO_SECRET)) { + /* privkey part */ + keypair_out = rspamd_keypair_print(kp, + RSPAMD_KEYPAIR_PRIVKEY | how); + ucl_object_insert_key(elt, + ucl_object_fromlstring(keypair_out->str, keypair_out->len), + "privkey", 0, false); + g_string_free(keypair_out, TRUE); + } + + keypair_out = rspamd_keypair_print(kp, + RSPAMD_KEYPAIR_ID | how); + ucl_object_insert_key(elt, + ucl_object_fromlstring(keypair_out->str, keypair_out->len), + "id", 0, false); + g_string_free(keypair_out, TRUE); + + ucl_object_insert_key(elt, + ucl_object_fromstring(encoding), + "encoding", 0, false); + + ucl_object_insert_key(elt, + ucl_object_fromstring( + kp->alg == RSPAMD_CRYPTOBOX_MODE_NIST ? "nistp256" : "curve25519"), + "algorithm", 0, false); + + ucl_object_insert_key(elt, + ucl_object_fromstring( + kp->type == RSPAMD_KEYPAIR_KEX ? "kex" : "sign"), + "type", 0, false); + + if (kp->extensions) { + ucl_object_insert_key(elt, ucl_object_copy(kp->extensions), + "extensions", 0, false); + } + + return ucl_out; +} + +gboolean +rspamd_keypair_decrypt(struct rspamd_cryptobox_keypair *kp, + const guchar *in, gsize inlen, + guchar **out, gsize *outlen, + GError **err) +{ + const guchar *nonce, *mac, *data, *pubkey; + + g_assert(kp != NULL); + g_assert(in != NULL); + + if (kp->type != RSPAMD_KEYPAIR_KEX) { + g_set_error(err, rspamd_keypair_quark(), EINVAL, + "invalid keypair type"); + + return FALSE; + } + + if (inlen < sizeof(encrypted_magic) + rspamd_cryptobox_pk_bytes(kp->alg) + + rspamd_cryptobox_mac_bytes(kp->alg) + + rspamd_cryptobox_nonce_bytes(kp->alg)) { + g_set_error(err, rspamd_keypair_quark(), E2BIG, "invalid size: too small"); + + return FALSE; + } + + if (memcmp(in, encrypted_magic, sizeof(encrypted_magic)) != 0) { + g_set_error(err, rspamd_keypair_quark(), EINVAL, + "invalid magic"); + + return FALSE; + } + + /* Set pointers */ + pubkey = in + sizeof(encrypted_magic); + mac = pubkey + rspamd_cryptobox_pk_bytes(kp->alg); + nonce = mac + rspamd_cryptobox_mac_bytes(kp->alg); + data = nonce + rspamd_cryptobox_nonce_bytes(kp->alg); + + if (data - in >= inlen) { + g_set_error(err, rspamd_keypair_quark(), E2BIG, "invalid size: too small"); + + return FALSE; + } + + inlen -= data - in; + + /* Allocate memory for output */ + *out = g_malloc(inlen); + memcpy(*out, data, inlen); + + if (!rspamd_cryptobox_decrypt_inplace(*out, inlen, nonce, pubkey, + rspamd_keypair_component(kp, RSPAMD_KEYPAIR_COMPONENT_SK, NULL), + mac, kp->alg)) { + g_set_error(err, rspamd_keypair_quark(), EPERM, "verification failed"); + g_free(*out); + + return FALSE; + } + + if (outlen) { + *outlen = inlen; + } + + return TRUE; +} + +gboolean +rspamd_keypair_encrypt(struct rspamd_cryptobox_keypair *kp, + const guchar *in, gsize inlen, + guchar **out, gsize *outlen, + GError **err) +{ + guchar *nonce, *mac, *data, *pubkey; + struct rspamd_cryptobox_keypair *local; + gsize olen; + + g_assert(kp != NULL); + g_assert(in != NULL); + + if (kp->type != RSPAMD_KEYPAIR_KEX) { + g_set_error(err, rspamd_keypair_quark(), EINVAL, + "invalid keypair type"); + + return FALSE; + } + + local = rspamd_keypair_new(kp->type, kp->alg); + + olen = inlen + sizeof(encrypted_magic) + + rspamd_cryptobox_pk_bytes(kp->alg) + + rspamd_cryptobox_mac_bytes(kp->alg) + + rspamd_cryptobox_nonce_bytes(kp->alg); + *out = g_malloc(olen); + memcpy(*out, encrypted_magic, sizeof(encrypted_magic)); + pubkey = *out + sizeof(encrypted_magic); + mac = pubkey + rspamd_cryptobox_pk_bytes(kp->alg); + nonce = mac + rspamd_cryptobox_mac_bytes(kp->alg); + data = nonce + rspamd_cryptobox_nonce_bytes(kp->alg); + + ottery_rand_bytes(nonce, rspamd_cryptobox_nonce_bytes(kp->alg)); + memcpy(data, in, inlen); + memcpy(pubkey, rspamd_keypair_component(kp, RSPAMD_KEYPAIR_COMPONENT_PK, NULL), + rspamd_cryptobox_pk_bytes(kp->alg)); + rspamd_cryptobox_encrypt_inplace(data, inlen, nonce, pubkey, + rspamd_keypair_component(local, RSPAMD_KEYPAIR_COMPONENT_SK, NULL), + mac, kp->alg); + rspamd_keypair_unref(local); + + if (outlen) { + *outlen = olen; + } + + return TRUE; +} + +gboolean +rspamd_pubkey_encrypt(struct rspamd_cryptobox_pubkey *pk, + const guchar *in, gsize inlen, + guchar **out, gsize *outlen, + GError **err) +{ + guchar *nonce, *mac, *data, *pubkey; + struct rspamd_cryptobox_keypair *local; + gsize olen; + + g_assert(pk != NULL); + g_assert(in != NULL); + + if (pk->type != RSPAMD_KEYPAIR_KEX) { + g_set_error(err, rspamd_keypair_quark(), EINVAL, + "invalid pubkey type"); + + return FALSE; + } + + local = rspamd_keypair_new(pk->type, pk->alg); + + olen = inlen + sizeof(encrypted_magic) + + rspamd_cryptobox_pk_bytes(pk->alg) + + rspamd_cryptobox_mac_bytes(pk->alg) + + rspamd_cryptobox_nonce_bytes(pk->alg); + *out = g_malloc(olen); + memcpy(*out, encrypted_magic, sizeof(encrypted_magic)); + pubkey = *out + sizeof(encrypted_magic); + mac = pubkey + rspamd_cryptobox_pk_bytes(pk->alg); + nonce = mac + rspamd_cryptobox_mac_bytes(pk->alg); + data = nonce + rspamd_cryptobox_nonce_bytes(pk->alg); + + ottery_rand_bytes(nonce, rspamd_cryptobox_nonce_bytes(pk->alg)); + memcpy(data, in, inlen); + memcpy(pubkey, rspamd_pubkey_get_pk(pk, NULL), + rspamd_cryptobox_pk_bytes(pk->alg)); + rspamd_cryptobox_encrypt_inplace(data, inlen, nonce, pubkey, + rspamd_keypair_component(local, RSPAMD_KEYPAIR_COMPONENT_SK, NULL), + mac, pk->alg); + rspamd_keypair_unref(local); + + if (outlen) { + *outlen = olen; + } + + return TRUE; +}
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