ESP-IDF
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Outline
#include "includes.h"
#include "common.h"
#include "asn1.h"
#include "bignum.h"
#include "rsa.h"
#include "pkcs5.h"
#include "pkcs8.h"
pkcs8_key_import(const u8 *, size_t)
pkcs8_enc_key_import(const u8 *, size_t, const char *)
Files
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SourceVuESP-IDF Framework and ExamplesESP-IDFcomponents/wpa_supplicant/src/tls/pkcs8.c
 
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/* * PKCS #8 (Private-key information syntax) * Copyright (c) 2006-2009, Jouni Malinen <j@w1.fi> * * This software may be distributed under the terms of the BSD license. * See README for more details. *//* ... */ #include "includes.h" #include "common.h" #include "asn1.h" #include "bignum.h" #include "rsa.h" #include "pkcs5.h" #include "pkcs8.h"7 includes struct crypto_private_key * pkcs8_key_import(const u8 *buf, size_t len) { struct asn1_hdr hdr; const u8 *pos, *end; struct bignum *zero; struct asn1_oid oid; char obuf[80]; /* PKCS #8, Chapter 6 */ /* PrivateKeyInfo ::= SEQUENCE */ if (asn1_get_next(buf, len, &hdr) < 0 || !asn1_is_sequence(&hdr)) { asn1_unexpected(&hdr, "PKCS #8: Does not start with PKCS #8 header (SEQUENCE)"); return NULL; }{...} pos = hdr.payload; end = pos + hdr.length; /* version Version (Version ::= INTEGER) */ if (asn1_get_next(pos, end - pos, &hdr) < 0 || !asn1_is_integer(&hdr)) { asn1_unexpected(&hdr, "PKCS #8: Expected INTEGER"); return NULL; }{...} zero = bignum_init(); if (zero == NULL) return NULL; if (bignum_set_unsigned_bin(zero, hdr.payload, hdr.length) < 0) { wpa_printf(MSG_DEBUG, "PKCS #8: Failed to parse INTEGER"); bignum_deinit(zero); return NULL; }{...} pos = hdr.payload + hdr.length; if (bignum_cmp_d(zero, 0) != 0) { wpa_printf(MSG_DEBUG, "PKCS #8: Expected zero INTEGER in the " "beginning of private key; not found; assume " "PKCS #8 not used"); bignum_deinit(zero); return NULL; }{...} bignum_deinit(zero); /* privateKeyAlgorithm PrivateKeyAlgorithmIdentifier * (PrivateKeyAlgorithmIdentifier ::= AlgorithmIdentifier) *//* ... */ if (asn1_get_next(pos, len, &hdr) < 0 || !asn1_is_sequence(&hdr)) { asn1_unexpected(&hdr, "PKCS #8: Expected SEQUENCE (AlgorithmIdentifier); assume PKCS #8 not used"); return NULL; }{...} if (asn1_get_oid(hdr.payload, hdr.length, &oid, &pos)) { wpa_printf(MSG_DEBUG, "PKCS #8: Failed to parse OID " "(algorithm); assume PKCS #8 not used"); return NULL; }{...} asn1_oid_to_str(&oid, obuf, sizeof(obuf)); wpa_printf(MSG_DEBUG, "PKCS #8: algorithm=%s", obuf); if (oid.len != 7 || oid.oid[0] != 1 /* iso */ || oid.oid[1] != 2 /* member-body */ || oid.oid[2] != 840 /* us */ || oid.oid[3] != 113549 /* rsadsi */ || oid.oid[4] != 1 /* pkcs */ || oid.oid[5] != 1 /* pkcs-1 */ || oid.oid[6] != 1 /* rsaEncryption */) { wpa_printf(MSG_DEBUG, "PKCS #8: Unsupported private key " "algorithm %s", obuf); return NULL; }{...} pos = hdr.payload + hdr.length; /* privateKey PrivateKey (PrivateKey ::= OCTET STRING) */ if (asn1_get_next(pos, end - pos, &hdr) < 0 || !asn1_is_octetstring(&hdr)) { asn1_unexpected(&hdr, "PKCS #8: Expected OCTETSTRING (privateKey)"); return NULL; }{...} wpa_printf(MSG_DEBUG, "PKCS #8: Try to parse RSAPrivateKey"); return (struct crypto_private_key *) crypto_rsa_import_private_key(hdr.payload, hdr.length); }{ ... } struct crypto_private_key * pkcs8_enc_key_import(const u8 *buf, size_t len, const char *passwd) { struct asn1_hdr hdr; const u8 *pos, *end, *enc_alg; size_t enc_alg_len; u8 *data; size_t data_len; if (passwd == NULL) return NULL; /* * PKCS #8, Chapter 7 * EncryptedPrivateKeyInfo ::= SEQUENCE { * encryptionAlgorithm EncryptionAlgorithmIdentifier, * encryptedData EncryptedData } * EncryptionAlgorithmIdentifier ::= AlgorithmIdentifier * EncryptedData ::= OCTET STRING *//* ... */ if (asn1_get_next(buf, len, &hdr) < 0 || !asn1_is_sequence(&hdr)) { asn1_unexpected(&hdr, "PKCS #8: Does not start with PKCS #8 header (SEQUENCE); assume encrypted PKCS #8 not used"); return NULL; }{...} pos = hdr.payload; end = pos + hdr.length; /* encryptionAlgorithm EncryptionAlgorithmIdentifier */ if (asn1_get_next(pos, end - pos, &hdr) < 0 || !asn1_is_sequence(&hdr)) { asn1_unexpected(&hdr, "PKCS #8: Expected SEQUENCE (AlgorithmIdentifier); assume encrypted PKCS #8 not used"); return NULL; }{...} enc_alg = hdr.payload; enc_alg_len = hdr.length; pos = hdr.payload + hdr.length; /* encryptedData EncryptedData */ if (asn1_get_next(pos, end - pos, &hdr) < 0 || !asn1_is_octetstring(&hdr)) { asn1_unexpected(&hdr, "PKCS #8: Expected OCTETSTRING (encryptedData)"); return NULL; }{...} data = pkcs5_decrypt(enc_alg, enc_alg_len, hdr.payload, hdr.length, passwd, &data_len); if (data) { struct crypto_private_key *key; key = pkcs8_key_import(data, data_len); os_free(data); return key; }{...} return NULL; }{ ... }
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