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libcrypto_utils: switch to C++.

Browse source 
brillo is long gone, so no one should care about being C any more, and
this will let future janitorial work take advantage of RAII.

Test: treehugger
Change-Id: I06acd01e8b30247bed6e971ab3e8660d3e599cce
This commit is contained in:
Elliott Hughes 2020-08-21 10:32:44 -07:00
parent cdfef7fe9e
commit 91784040db
2 changed files with 14 additions and 15 deletions
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2
libcrypto_utils/Android.bp
View file

@ -23,7 +23,7 @@ cc_library {
},
host_supported: true,
srcs: [
"android_pubkey.c",
"android_pubkey.cpp",
],
cflags: [
"-Wall",

27
libcrypto_utils/android_pubkey.c → libcrypto_utils/android_pubkey.cpp
View file

@ -35,22 +35,22 @@
// little-endian 32 bit words. Note that Android only supports little-endian
// processors, so we don't do any byte order conversions when parsing the binary
// struct.
typedef struct RSAPublicKey {
// Modulus length. This must be ANDROID_PUBKEY_MODULUS_SIZE.
uint32_t modulus_size_words;
struct RSAPublicKey {
// Modulus length. This must be ANDROID_PUBKEY_MODULUS_SIZE.
uint32_t modulus_size_words;
// Precomputed montgomery parameter: -1 / n[0] mod 2^32
uint32_t n0inv;
// Precomputed montgomery parameter: -1 / n[0] mod 2^32
uint32_t n0inv;
// RSA modulus as a little-endian array.
uint8_t modulus[ANDROID_PUBKEY_MODULUS_SIZE];
// RSA modulus as a little-endian array.
uint8_t modulus[ANDROID_PUBKEY_MODULUS_SIZE];
// Montgomery parameter R^2 as a little-endian array.
uint8_t rr[ANDROID_PUBKEY_MODULUS_SIZE];
// Montgomery parameter R^2 as a little-endian array.
uint8_t rr[ANDROID_PUBKEY_MODULUS_SIZE];
// RSA modulus: 3 or 65537
uint32_t exponent;
} RSAPublicKey;
// RSA modulus: 3 or 65537
uint32_t exponent;
};
bool android_pubkey_decode(const uint8_t* key_buffer, size_t size, RSA** key) {
const RSAPublicKey* key_struct = (RSAPublicKey*)key_buffer;
@ -116,8 +116,7 @@ bool android_pubkey_encode(const RSA* key, uint8_t* key_buffer, size_t size) {
BIGNUM* n0inv = BN_new();
BIGNUM* rr = BN_new();
if (sizeof(RSAPublicKey) > size ||
RSA_size(key) != ANDROID_PUBKEY_MODULUS_SIZE) {
if (sizeof(RSAPublicKey) > size || RSA_size(key) != ANDROID_PUBKEY_MODULUS_SIZE) {
goto cleanup;
}