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Fix some build warnings.

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This commit is contained in:
Maarten Billemont 2017-08-06 18:56:37 -04:00
parent 68d1ab58b7
commit 18daef7808
5 changed files with 72 additions and 92 deletions
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121
core/c/base64.c
View File

@ -57,7 +57,7 @@
#include "base64.h"
/* aaaack but it's fast and const should make it shared text page. */
static const unsigned char pr2six[256] =
static const unsigned char b64ToBits[256] =
{
/* ASCII table */
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
@ -80,58 +80,39 @@ static const unsigned char pr2six[256] =
size_t mpw_base64_decode_max(const char *b64Text) {
register const uint8_t *bufin;
register int nprbytes;
register const uint8_t *b64Cursor = (uint8_t *)b64Text;
while (b64ToBits[*(b64Cursor++)] <= 63);
int b64Size = (int)(b64Cursor - (uint8_t *)b64Text) - 1;
bufin = (uint8_t *)b64Text;
while (pr2six[*(bufin++)] <= 63);
nprbytes = (int)(bufin - (uint8_t *)b64Text) - 1;
return (size_t)(((nprbytes + 3) / 4) * 3);
// Every 4 b64 chars yield 3 plain bytes => len = 3 * ceil(b64Size / 4)
return (size_t)(3 /*bytes*/ * ((b64Size + 4 /*chars*/ - 1) / 4 /*chars*/));
}
int mpw_base64_decode(uint8_t *plainBuf, size_t plainMax, const char *b64Text) {
int mpw_base64_decode(uint8_t *plainBuf, const char *b64Text) {
register const uint8_t *bufin;
register uint8_t *bufout;
register int nprbytes;
register const uint8_t *b64Cursor = (uint8_t *)b64Text;
while (b64ToBits[*(b64Cursor++)] <= 63);
int b64Remaining = (int)(b64Cursor - (uint8_t *)b64Text) - 1;
bufin = (uint8_t *)b64Text;
while (pr2six[*(bufin++)] <= 63);
nprbytes = (int)(bufin - (uint8_t *)b64Text) - 1;
bufout = plainBuf;
bufin = (uint8_t *)b64Text;
while (nprbytes > 4) {
if (bufout + 2 >= plainBuf + plainMax)
return -1;
*(bufout++) = (pr2six[*bufin] << 2 | pr2six[bufin[1]] >> 4);
*(bufout++) = (pr2six[bufin[1]] << 4 | pr2six[bufin[2]] >> 2);
*(bufout++) = (pr2six[bufin[2]] << 6 | pr2six[bufin[3]]);
bufin += 4;
nprbytes -= 4;
b64Cursor = (uint8_t *)b64Text;
register uint8_t *plainCursor = plainBuf;
while (b64Remaining > 4) {
*(plainCursor++) = (b64ToBits[b64Cursor[0]] << 2 | b64ToBits[b64Cursor[1]] >> 4);
*(plainCursor++) = (b64ToBits[b64Cursor[1]] << 4 | b64ToBits[b64Cursor[2]] >> 2);
*(plainCursor++) = (b64ToBits[b64Cursor[2]] << 6 | b64ToBits[b64Cursor[3]]);
b64Cursor += 4;
b64Remaining -= 4;
}
/* Note: (nprbytes == 1) would be an error, so just ingore that case */
if (nprbytes > 1) {
if (bufout >= plainBuf + plainMax)
return -1;
*(bufout++) = (pr2six[*bufin] << 2 | pr2six[bufin[1]] >> 4);
}
if (nprbytes > 2) {
if (bufout >= plainBuf + plainMax)
return -1;
*(bufout++) = (pr2six[bufin[1]] << 4 | pr2six[bufin[2]] >> 2);
}
if (nprbytes > 3) {
if (bufout >= plainBuf + plainMax)
return -1;
*(bufout++) = (pr2six[bufin[2]] << 6 | pr2six[bufin[3]]);
}
/* Note: (b64Size == 1) would be an error, so just ingore that case */
if (b64Remaining > 1)
*(plainCursor++) = (b64ToBits[b64Cursor[0]] << 2 | b64ToBits[b64Cursor[1]] >> 4);
if (b64Remaining > 2)
*(plainCursor++) = (b64ToBits[b64Cursor[1]] << 4 | b64ToBits[b64Cursor[2]] >> 2);
if (b64Remaining > 3)
*(plainCursor++) = (b64ToBits[b64Cursor[2]] << 6 | b64ToBits[b64Cursor[3]]);
return (int)(bufout - plainBuf);
return (int)(plainCursor - plainBuf);
}
static const char basis_64[] =
@ -143,40 +124,32 @@ size_t mpw_base64_encode_max(size_t plainSize) {
return 4 /*chars*/ * (plainSize + 3 /*bytes*/ - 1) / 3 /*bytes*/;
}
int mpw_base64_encode(char *b64Text, size_t b64Max, const uint8_t *plainBuf, size_t plainSize) {
int mpw_base64_encode(char *b64Text, const uint8_t *plainBuf, size_t plainSize) {
int i;
char *p;
p = b64Text;
for (i = 0; i < plainSize - 2; i += 3) {
if (p >= b64Text + b64Max)
return -1;
*p++ = basis_64[(plainBuf[i] >> 2) & 0x3F];
*p++ = basis_64[((plainBuf[i] & 0x3) << 4) |
((plainBuf[i + 1] & 0xF0) >> 4)];
*p++ = basis_64[((plainBuf[i + 1] & 0xF) << 2) |
((plainBuf[i + 2] & 0xC0) >> 6)];
*p++ = basis_64[plainBuf[i + 2] & 0x3F];
int plainCursor = 0;
char *b64Cursor = b64Text;
for (; plainCursor < plainSize - 2; plainCursor += 3) {
*b64Cursor++ = basis_64[((plainBuf[plainCursor] >> 2)) & 0x3F];
*b64Cursor++ = basis_64[((plainBuf[plainCursor] & 0x3) << 4) |
((plainBuf[plainCursor + 1] & 0xF0) >> 4)];
*b64Cursor++ = basis_64[((plainBuf[plainCursor + 1] & 0xF) << 2) |
((plainBuf[plainCursor + 2] & 0xC0) >> 6)];
*b64Cursor++ = basis_64[plainBuf[plainCursor + 2] & 0x3F];
}
if (i < plainSize) {
if (p + 3 >= b64Text + b64Max)
return -1;
*p++ = basis_64[(plainBuf[i] >> 2) & 0x3F];
if (i == (plainSize - 1)) {
*p++ = basis_64[((plainBuf[i] & 0x3) << 4)];
*p++ = '=';
if (plainCursor < plainSize) {
*b64Cursor++ = basis_64[(plainBuf[plainCursor] >> 2) & 0x3F];
if (plainCursor == (plainSize - 1)) {
*b64Cursor++ = basis_64[((plainBuf[plainCursor] & 0x3) << 4)];
*b64Cursor++ = '=';
}
else {
*p++ = basis_64[((plainBuf[i] & 0x3) << 4) |
((plainBuf[i + 1] & 0xF0) >> 4)];
*p++ = basis_64[((plainBuf[i + 1] & 0xF) << 2)];
*b64Cursor++ = basis_64[((plainBuf[plainCursor] & 0x3) << 4) |
((plainBuf[plainCursor + 1] & 0xF0) >> 4)];
*b64Cursor++ = basis_64[((plainBuf[plainCursor + 1] & 0xF) << 2)];
}
*p++ = '=';
*b64Cursor++ = '=';
}
*p = '\0';
return (int)(p - b64Text);
*b64Cursor = '\0';
return (int)(b64Cursor - b64Text);
}

13
core/c/base64.h
View File

@ -62,18 +62,17 @@
*/
size_t mpw_base64_decode_max(const char *b64Text);
/** Decodes a base-64 encoded string into a plain byte buffer.
* @param plainMax the maximum amount of bytes to write to plainBuf.
* @return The amount of bytes that were written to plainBuf or -1 if this amount would have exceeded plainMax.
* @param plainBuf a byte buffer, size should be at least mpw_base64_decode_max(b64Text)
* @return The amount of bytes that were written to plainBuf.
*/
int mpw_base64_decode(uint8_t *plainBuf, size_t plainMax, const char *b64Text);
int mpw_base64_decode(uint8_t *plainBuf, const char *b64Text);
/**
* @return The amount of characters needed to encode a plainBuf of the given size as base-64 (excluding the terminating NUL).
*/
size_t mpw_base64_encode_max(size_t plainSize);
/** Encodes a plain byte buffer into a base-64 encoded string.
* @param b64Max the maximum amount of characters to write to b64Text, excluding the terminating NUL.
* @return The amount of characters that were written to b64Text, excluding the terminating NUL
* or -1 if this amount would have exceeded b64Max.
* @param b64Text a character buffer, size should be at least mpw_base64_encode_max(plainSize) + 1
* @return The amount of characters that were written to b64Text, excluding the terminating NUL.
*/
int mpw_base64_encode(char *b64Text, size_t b64Max, const uint8_t *plainBuf, size_t plainSize);
int mpw_base64_encode(char *b64Text, const uint8_t *plainBuf, size_t plainSize);

10
core/c/mpw-algorithm_v0.c
View File

@ -163,7 +163,7 @@ const char *mpw_encrypt_v0(
// Base64-encode
size_t b64Max = mpw_base64_encode_max( bufSize );
char *cipherText = calloc( 1, b64Max + 1 );
if (mpw_base64_encode( cipherText, b64Max, cipherBuf, bufSize ) < 0) {
if (mpw_base64_encode( cipherText, cipherBuf, bufSize ) < 0) {
err( "Base64 encoding error." );
mpw_free_string( cipherText );
cipherText = NULL;
@ -178,14 +178,14 @@ const char *mpw_decrypt_v0(
MPMasterKey masterKey, const char *cipherText) {
// Base64-decode
size_t bufSize = mpw_base64_decode_max( cipherText );
uint8_t *cipherBuf = calloc( 1, bufSize );
if ((bufSize = (size_t)mpw_base64_decode( cipherBuf, bufSize, cipherText )) < 0) {
uint8_t *cipherBuf = calloc( 1, mpw_base64_decode_max( cipherText ) );
size_t bufSize = (size_t)mpw_base64_decode( cipherBuf, cipherText );
if ((int)bufSize < 0) {
err( "Base64 decoding error." );
mpw_free( cipherBuf, mpw_base64_decode_max( cipherText ) );
return NULL;
}
trc( "b64 decoded: %lu bytes = %s\n", bufSize, mpw_hex( cipherBuf, bufSize ) );
trc( "b64 decoded: %zu bytes = %s\n", bufSize, mpw_hex( cipherBuf, bufSize ) );
// Decrypt
const uint8_t *plainBytes = mpw_aes_decrypt( masterKey, MPMasterKeySize, cipherBuf, bufSize );

11
core/c/mpw-util.c
View File

@ -91,7 +91,7 @@ bool mpw_push_int(uint8_t **const buffer, size_t *const bufferSize, const uint32
return mpw_push_buf( buffer, bufferSize, &pushInt, sizeof( pushInt ) );
}
bool mpw_realloc(void **buffer, size_t *bufferSize, const size_t deltaSize) {
bool __mpw_realloc(void **buffer, size_t *bufferSize, const size_t deltaSize) {
if (!buffer)
return false;
@ -188,6 +188,10 @@ static uint8_t const *mpw_aes(bool encrypt, const uint8_t *key, const size_t key
uint8_t nonce[crypto_stream_NONCEBYTES];
bzero( (void *)nonce, sizeof( nonce ) );
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
if (encrypt) {
uint8_t *const cipherBuf = malloc( bufSize );
if (crypto_stream_aes128ctr_xor( cipherBuf, buf, bufSize, nonce, key ) != 0) {
@ -195,7 +199,8 @@ static uint8_t const *mpw_aes(bool encrypt, const uint8_t *key, const size_t key
return NULL;
}
return cipherBuf;
} else {
}
else {
uint8_t *const plainBuf = malloc( bufSize );
if (crypto_stream_aes128ctr( plainBuf, bufSize, nonce, key ) != 0) {
mpw_free( plainBuf, bufSize );
@ -205,6 +210,8 @@ static uint8_t const *mpw_aes(bool encrypt, const uint8_t *key, const size_t key
plainBuf[c] = buf[c] ^ plainBuf[c];
return plainBuf;
}
#pragma clang diagnostic pop
#pragma GCC diagnostic pop
#else
#error No crypto support for mpw_aes.
#endif

5
core/c/mpw-util.h
View File

@ -121,8 +121,9 @@ bool mpw_push_int(
* @param deltaSize The amount to increase the buffer's size by.
* @return true if successful, false if reallocation failed.
*/
bool mpw_realloc(
void **buffer, size_t *bufferSize, const size_t deltaSize);
#define mpw_realloc(buffer, bufferSize, deltaSize) \
__mpw_realloc( (void **)buffer, bufferSize, deltaSize )
bool __mpw_realloc(void **buffer, size_t *bufferSize, const size_t deltaSize);
/** Free a buffer after zero'ing its contents. */
bool mpw_free(
const void *buffer, const size_t bufferSize);