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minio/pkg/utils/crypto/sha256/sha256.go

60 lines
1.3 KiB

// +build amd64
package sha256
// #include <stdint.h>
// void sha256_transform_avx (uint8_t *input_data, uint32_t digest[8], uint64_t num_blks);
// void sha256_transform_ssse3 (uint8_t *input_data, uint32_t digest[8], uint64_t num_blks);
// void sha256_transform_rorx (uint8_t *input_data, uint32_t digest[8], uint64_t num_blks);
// #define SHA256_DIGEST_SIZE 32
// #define SHA256_BLOCK_SIZE 64
// #define SHA256_H0 0x6a09e667UL
// #define SHA256_H1 0xbb67ae85UL
// #define SHA256_H2 0x3c6ef372UL
// #define SHA256_H3 0xa54ff53aUL
// #define SHA256_H4 0x510e527fUL
// #define SHA256_H5 0x9b05688cUL
// #define SHA256_H6 0x1f83d9abUL
// #define SHA256_H7 0x5be0cd19UL
import "C"
import (
gosha256 "crypto/sha256"
"io"
)
/*
func Sha256(buffer []byte) ([]uint32, error) {
if cpu.HasSSE41() {
C.sha256_transform_ssse3()
return 0, nil
}
if cpu.HasAVX() {
C.sha256_transform_avx()
return 0, nil
}
if cpu.HasAVX2() {
C.sha256_transform_rorx()
return 0, nil
}
}
*/
func Sum(reader io.Reader) ([]byte, error) {
hash := gosha256.New()
var err error
for err == nil {
length := 0
byteBuffer := make([]byte, 1024*1024)
length, err = reader.Read(byteBuffer)
byteBuffer = byteBuffer[0:length]
hash.Write(byteBuffer)
}
if err != io.EOF {
return nil, err
}
return hash.Sum(nil), nil
}