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Avoid unaligned access in crypto i/o

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This commit is contained in:
Pieter Wuille 2017-01-10 14:14:01 -08:00
parent 02e5308c1b
commit 843c560003
1 changed files with 26 additions and 10 deletions
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36
src/crypto/common.h
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@ -10,57 +10,73 @@
#endif
#include <stdint.h>
#include <string.h>
#include "compat/endian.h"
uint16_t static inline ReadLE16(const unsigned char* ptr)
{
return le16toh(*((uint16_t*)ptr));
uint16_t x;
memcpy((char*)&x, ptr, 2);
return le16toh(x);
}
uint32_t static inline ReadLE32(const unsigned char* ptr)
{
return le32toh(*((uint32_t*)ptr));
uint32_t x;
memcpy((char*)&x, ptr, 4);
return le32toh(x);
}
uint64_t static inline ReadLE64(const unsigned char* ptr)
{
return le64toh(*((uint64_t*)ptr));
uint64_t x;
memcpy((char*)&x, ptr, 8);
return le64toh(x);
}
void static inline WriteLE16(unsigned char* ptr, uint16_t x)
{
*((uint16_t*)ptr) = htole16(x);
uint16_t v = htole16(x);
memcpy(ptr, (char*)&v, 2);
}
void static inline WriteLE32(unsigned char* ptr, uint32_t x)
{
*((uint32_t*)ptr) = htole32(x);
uint32_t v = htole32(x);
memcpy(ptr, (char*)&v, 4);
}
void static inline WriteLE64(unsigned char* ptr, uint64_t x)
{
*((uint64_t*)ptr) = htole64(x);
uint64_t v = htole64(x);
memcpy(ptr, (char*)&v, 8);
}
uint32_t static inline ReadBE32(const unsigned char* ptr)
{
return be32toh(*((uint32_t*)ptr));
uint32_t x;
memcpy((char*)&x, ptr, 4);
return be32toh(x);
}
uint64_t static inline ReadBE64(const unsigned char* ptr)
{
return be64toh(*((uint64_t*)ptr));
uint64_t x;
memcpy((char*)&x, ptr, 8);
return be64toh(x);
}
void static inline WriteBE32(unsigned char* ptr, uint32_t x)
{
*((uint32_t*)ptr) = htobe32(x);
uint32_t v = htobe32(x);
memcpy(ptr, (char*)&v, 4);
}
void static inline WriteBE64(unsigned char* ptr, uint64_t x)
{
*((uint64_t*)ptr) = htobe64(x);
uint64_t v = htobe64(x);
memcpy(ptr, (char*)&v, 8);
}
#endif // BITCOIN_CRYPTO_COMMON_H