Comments (7)
lucy-sha512
commented on May 24, 2024
I figured out the stringSize type and tried to run the following code as a test:
package main
import (
"crypto/hmac"
)
type Garbler struct {
msg [32]byte
keyShare [64]byte
}
func main(g Garbler, eKeyShare [64]byte) []byte {
var key [64]byte
for i := 0; i < len(key); i++ {
key[i] = g.keyShare[i] ^ eKeyShare[i]
}
byteArray := []byte{0x48, 0x65, 0x6C, 0x6C, 0x6F} // Example byte array
var hexString string10
for i:=0; i < len(byteArray); i++ {
hexString += byteToHexString(byteArray[i])
}
return hmac.SumSHA256(g.msg, key)
}
func byteToHexString(b byte) string {
hexChars := "0123456789ABCDEF"
high := b >> 4
low := b & 0x0F
return string(hexChars[high]) + string(hexChars[low])
}
but it throws an exception
./garbled -e -v -i 0xf87a00ef89c2396de32f6ac0748f6fa1b641013d46f74ce25cc625904215a67501c0c7196a2602f6516527958a82271847933c35d170d98bfdb04d2ddf3bb197 examples/hmac-sha256.mpcl
Listening for connections at :8080
New connection from 127.0.0.1:54384
found PkgRoot from '/home/lucy/go/src/github.com/markkurossi/mpc/pkg'
looking for package hmac (crypto/hmac)
- parsing @/crypto/hmac/doc.mpcl
- parsing @/crypto/hmac/sha512.mpcl
looking for package sha512 (crypto/sha512)
- parsing @/crypto/sha512/sum.mpcl
- parsing @/crypto/hmac/sha256.mpcl
looking for package sha256 (crypto/sha256)
- parsing @/crypto/sha256/sum.mpcl
Initializing main
Initializing hmac
Initializing sha512
Initializing sha256
panic: v.Type.Bits == 0: $""
goroutine 1 [running]:
github.com/markkurossi/mpc/compiler/ssa.Value.Check({{0xc000381adb, 0x3}, 0x568, 0x0, 0x1, 0x0, 0x0, {0x0, 0x5, 0x0, ...}, ...})
/home/lucy/go/src/github.com/markkurossi/mpc/compiler/ssa/value.go:68 +0x85
github.com/markkurossi/mpc/compiler/ssa.Instr.Check(...)
/home/lucy/go/src/github.com/markkurossi/mpc/compiler/ssa/instructions.go:162
github.com/markkurossi/mpc/compiler/ssa.(*Block).AddInstr(...)
/home/lucy/go/src/github.com/markkurossi/mpc/compiler/ssa/block.go:79
github.com/markkurossi/mpc/compiler/ast.(*VariableDef).SSA(0xc0000b50a0, 0xc0000fc9a0, 0xc0000b5e30, 0xc0000f7920)
/home/lucy/go/src/github.com/markkurossi/mpc/compiler/ast/ssagen.go:205 +0x1238
github.com/markkurossi/mpc/compiler/ast.List.SSA({0xc00002c800?, 0x7, 0x1000000000014?}, 0x0?, 0xc0000b5e30, 0x0?)
/home/lucy/go/src/github.com/markkurossi/mpc/compiler/ast/ssagen.go:39 +0x95
github.com/markkurossi/mpc/compiler/ast.(*Func).SSA(0xc00009e9c0, 0xc0000fc9a0, 0xc0000b5e30, 0x0?)
/home/lucy/go/src/github.com/markkurossi/mpc/compiler/ast/ssagen.go:74 +0x6c7
github.com/markkurossi/mpc/compiler/ast.(*Package).Compile(0xc0000a08c0, 0xc0000b5e30)
/home/lucy/go/src/github.com/markkurossi/mpc/compiler/ast/package.go:110 +0xc85
github.com/markkurossi/mpc/compiler.(*Compiler).compile(0xc00007c700, {0x7fff1a48129a, 0x19}, {0x6d02e0, 0xc0000600b8}, {0xc0000f6090, 0x2, 0x2})
/home/lucy/go/src/github.com/markkurossi/mpc/compiler/compiler.go:85 +0x2e5
github.com/markkurossi/mpc/compiler.(*Compiler).CompileFile(0x0?, {0x7fff1a48129a, 0x19}, {0xc0000f6090, 0x2, 0x2})
/home/lucy/go/src/github.com/markkurossi/mpc/compiler/compiler.go:60 +0x145
main.loadCircuit({0x7fff1a48129a, 0x19}, 0xc0000fa000, {0xc0000f6090, 0x2, 0x2})
/home/lucy/go/src/github.com/markkurossi/mpc/apps/garbled/main.go:163 +0x252
main.evaluatorMode({0x6d10d8, 0xc000092320}, {0x7fff1a48129a, 0x19}, 0x66e639?, 0x0)
/home/lucy/go/src/github.com/markkurossi/mpc/apps/garbled/main.go:260 +0x4e5
main.main()
/home/lucy/go/src/github.com/markkurossi/mpc/apps/garbled/main.go:142 +0x89f
Can you guide why this happens?
from mpc.
lucy-sha512
commented on May 24, 2024
I want to import golang package like "fmt" and "hex/encoding" but it throws this error:
found PkgRoot from '/home/lucy/go/src/github.com/markkurossi/mpc/pkg'
looking for package hmac (crypto/hmac)
- parsing @/crypto/hmac/doc.mpcl
- parsing @/crypto/hmac/sha512.mpcl
looking for package sha512 (crypto/sha512)
- parsing @/crypto/sha512/sum.mpcl
- parsing @/crypto/hmac/sha256.mpcl
looking for package sha256 (crypto/sha256)
- parsing @/crypto/sha256/sum.mpcl
looking for package hex (encoding/hex)
package encoding/hex not found
Any way to fix this?
from mpc.
markkurossi
commented on May 24, 2024
The string support is still very limited. I implemented cast operation from []byte to string string([]byte) so now it is possible to convert from bytes to strings and vice versa. I also created encoding/hex package that implements EncodeToString(src []byte) string function.
The fmt package is not currently supported. All supported packages can be found from the pkg directory from the root of the repository.
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lucy-sha512
commented on May 24, 2024
Thank you for your input. I guess the message is also handled in form of hex bytes.
We want to have the message in form of utf encoding . We are using this library to fetch API response from a server. According to it, the message string is encoded in utf:
mac = hmac.new(bytes(secret_key, encoding='utf8'), bytes(message, encoding='utf-8'), digestmod='sha256')
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xomexh
commented on May 24, 2024
The string support is still very limited. I implemented cast operation from []byte to string
string([]byte)so now it is possible to convert from bytes to strings and vice versa. I also createdencoding/hexpackage that implementsEncodeToString(src []byte) stringfunction.The
fmtpackage is not currently supported. All supported packages can be found from thepkgdirectory from the root of the repository.
Hi, I'm trying to cast the msg param of Garbler struct, into string, but it does not seem to be working.
Modified examples/hmac-sha256.mpcl file
type Garbler struct {
msg [43]byte,
keyShare [64]byte
}
func main(g Garbler, eKeyShare [64]byte) []byte {
var key [64]byte
for i := 0; i < len(key); i++ {
key[i] = g.keyShare[i] ^ eKeyShare[i]
}
hexBytes := make([]byte, len(key)*2)
var b byte
var hexChars [64]byte
for i := 0; i < len(key); i++ {
b = key[i]
hexChars = byteToHexString(b)
hexBytes[i*2] = hexChars[0]
hexBytes[i*2+1] = hexChars[1]
}
hexString := string512(hexBytes)
mType := make([]byte, size(hexString)/8)
for i := 0; i < len(hexString) ; i++ {
mType[i] = hexString[i]
}
resultString := string344(g.msg)
sType := make([]byte, size(resultString)/8)
for i := 0; i < len(resultString) ; i++ {
sType[i] = resultString[i]
}
return hmac.SumSHA256(sType, mType)
}
func byteToHexString(b byte) []byte {
hexChars := []byte("0123456789abcdef")
high := b >> 4
low := b & 0x0F
result := make([]byte, 2)
result[0] = hexChars[high]
result[1] = hexChars[low]
return result
}
These changes yield the proper HMAC Key for me.
However, as I want to make the msg field dynamic, i.e msg []bytes
I encounter this error:
Initializing hmac
Initializing sha256
Initializing sha512
panic: v.Type.Bits == 0: %_{0,835}arr
goroutine 1 [running]:
github.com/markkurossi/mpc/compiler/ssa.Value.Check({{0x100979202, 0x2}, 0x1cb5, 0x0, 0x0, 0x0, 0x343, {0x0, 0x7, 0x0, ...}, ...})
/Users/soms/go/src/github.com/markkurossi/mpc/compiler/ssa/value.go:68 +0x8c
github.com/markkurossi/mpc/compiler/ssa.Instr.Check(...)
/Users/soms/go/src/github.com/markkurossi/mpc/compiler/ssa/instructions.go:162
github.com/markkurossi/mpc/compiler/ssa.(*Block).AddInstr(...)
/Users/soms/go/src/github.com/markkurossi/mpc/compiler/ssa/block.go:79
github.com/markkurossi/mpc/compiler/ast.(*Call).SSA(0x140001cae00, 0x14000479420, 0x14000420540, 0x140003f38c0)
/Users/soms/go/src/github.com/markkurossi/mpc/compiler/ast/ssagen.go:681 +0x1084
github.com/markkurossi/mpc/compiler/ast.(*Assign).SSA(0x140001a7020, 0x14000479420?, 0x14000420540, 0x140003f38c0)
/Users/soms/go/src/github.com/markkurossi/mpc/compiler/ast/ssagen.go:261 +0x430
github.com/markkurossi/mpc/compiler/ast.List.SSA({0x140001ec700?, 0xe, 0x1000000000049?}, 0x0?, 0x14000420540, 0x0?)
/Users/soms/go/src/github.com/markkurossi/mpc/compiler/ast/ssagen.go:39 +0x8c
github.com/markkurossi/mpc/compiler/ast.(*Func).SSA(0x14000196dd0, 0x14000247180, 0x14000420540, 0x0?)
/Users/soms/go/src/github.com/markkurossi/mpc/compiler/ast/ssagen.go:74 +0x588
github.com/markkurossi/mpc/compiler/ast.(*Package).Compile(0x14000198960, 0x14000420540)
/Users/soms/go/src/github.com/markkurossi/mpc/compiler/ast/package.go:110 +0xa18
github.com/markkurossi/mpc/compiler.(*Compiler).compile(0x140001c2700, {0x16f663524, 0x19}, {0x100a46740, 0x140001920a0}, {0x140002060f0, 0x2, 0x2})
/Users/soms/go/src/github.com/markkurossi/mpc/compiler/compiler.go:85 +0x260
github.com/markkurossi/mpc/compiler.(*Compiler).CompileFile(0x140001d1be8?, {0x16f663524, 0x19}, {0x140002060f0, 0x2, 0x2})
/Users/soms/go/src/github.com/markkurossi/mpc/compiler/compiler.go:60 +0xf0
main.loadCircuit({0x16f663524, 0x19}, 0x1400020c000, {0x140002060f0, 0x2, 0x2})
/Users/soms/go/src/github.com/markkurossi/mpc/apps/garbled/main.go:163 +0x1e8
main.garblerMode({0x100a47580, 0x140001ae320}, {0x16f663524, 0x19}, 0x100985a32?)
/Users/soms/go/src/github.com/markkurossi/mpc/apps/garbled/main.go:322 +0x29c
main.main()
/Users/soms/go/src/github.com/markkurossi/mpc/apps/garbled/main.go:144 +0x800
I have tried changing msg [43]bytes and resultString := string344(g.msg) to msg []bytes and resultString := string(g.msg), however I face the error
Initializing hmac
Initializing sha256
Initializing sha512
Initializing hex
panic: v.Type.Bits == 0: %_{0,835}arr
goroutine 1 [running]:
github.com/markkurossi/mpc/compiler/ssa.Value.Check({{0x102fad202, 0x2}, 0x1cb5, 0x0, 0x0, 0x0, 0x343, {0x0, 0x7, 0x0, ...}, ...})
/Users/soms/go/src/github.com/markkurossi/mpc/compiler/ssa/value.go:68 +0x8c
github.com/markkurossi/mpc/compiler/ssa.Instr.Check(...)
/Users/soms/go/src/github.com/markkurossi/mpc/compiler/ssa/instructions.go:162
github.com/markkurossi/mpc/compiler/ssa.(*Block).AddInstr(...)
/Users/soms/go/src/github.com/markkurossi/mpc/compiler/ssa/block.go:79
github.com/markkurossi/mpc/compiler/ast.(*Call).SSA(0x14000078e40, 0x1400038b880, 0x14000364540, 0x140003318c0)
/Users/soms/go/src/github.com/markkurossi/mpc/compiler/ast/ssagen.go:681 +0x1084
github.com/markkurossi/mpc/compiler/ast.(*Assign).SSA(0x1400007b080, 0x1400038b880?, 0x14000364540, 0x140003318c0)
/Users/soms/go/src/github.com/markkurossi/mpc/compiler/ast/ssagen.go:261 +0x430
github.com/markkurossi/mpc/compiler/ast.List.SSA({0x14000148700?, 0xe, 0x1000000000049?}, 0x0?, 0x14000364540, 0x0?)
/Users/soms/go/src/github.com/markkurossi/mpc/compiler/ast/ssagen.go:39 +0x8c
github.com/markkurossi/mpc/compiler/ast.(*Func).SSA(0x1400007ed00, 0x14000177180, 0x14000364540, 0x0?)
/Users/soms/go/src/github.com/markkurossi/mpc/compiler/ast/ssagen.go:74 +0x588
github.com/markkurossi/mpc/compiler/ast.(*Package).Compile(0x14000108960, 0x14000364540)
/Users/soms/go/src/github.com/markkurossi/mpc/compiler/ast/package.go:110 +0xa18
github.com/markkurossi/mpc/compiler.(*Compiler).compile(0x1400006e720, {0x16d02f524, 0x19}, {0x10307a740, 0x140000520b0}, {0x140001600f0, 0x2, 0x2})
/Users/soms/go/src/github.com/markkurossi/mpc/compiler/compiler.go:85 +0x260
github.com/markkurossi/mpc/compiler.(*Compiler).CompileFile(0x14000131be8?, {0x16d02f524, 0x19}, {0x140001600f0, 0x2, 0x2})
/Users/soms/go/src/github.com/markkurossi/mpc/compiler/compiler.go:60 +0xf0
main.loadCircuit({0x16d02f524, 0x19}, 0x14000164000, {0x140001600f0, 0x2, 0x2})
/Users/soms/go/src/github.com/markkurossi/mpc/apps/garbled/main.go:163 +0x1e8
main.garblerMode({0x10307b580, 0x14000012410}, {0x16d02f524, 0x19}, 0x102fb9a32?)
/Users/soms/go/src/github.com/markkurossi/mpc/apps/garbled/main.go:322 +0x29c
main.main()
/Users/soms/go/src/github.com/markkurossi/mpc/apps/garbled/main.go:144 +0x800
Could you give insights on how I can make the message field dynamic accordingly?
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markkurossi
commented on May 24, 2024
There has been quite many changes in the string type and type conversions lately. Could you please pull the latest version and test if the problem still persists. I tried you example on top of the master and it seems to work - but it always Works for Me(TM) :)
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xomexh
commented on May 24, 2024
Hi Mark, a recent pull and build solved my errors. Thank you so much!
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Related Issues (10)
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- support more mpc protocols
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