66 lines
1.7 KiB
Go
66 lines
1.7 KiB
Go
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package i2pkeys
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import (
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"crypto/sha256"
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"errors"
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"strings"
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)
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// an i2p destination hash, the .b32.i2p address if you will
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type I2PDestHash [32]byte
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// create a desthash from a string b32.i2p address
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func DestHashFromString(str string) (dhash I2PDestHash, err error) {
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log.WithField("address", str).Debug("Creating desthash from string")
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if strings.HasSuffix(str, ".b32.i2p") && len(str) == 60 {
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// valid
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_, err = i2pB32enc.Decode(dhash[:], []byte(str[:52]+"===="))
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if err != nil {
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log.WithError(err).Error("Error decoding base32 address")
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}
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} else {
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// invalid
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err = errors.New("invalid desthash format")
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log.WithError(err).Error("Invalid desthash format")
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}
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return
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}
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// create a desthash from a []byte array
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func DestHashFromBytes(str []byte) (dhash I2PDestHash, err error) {
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log.Debug("Creating DestHash from bytes")
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if len(str) == 32 {
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// valid
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//_, err = i2pB32enc.Decode(dhash[:], []byte(str[:52]+"===="))
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log.WithField("str", str).Debug("Copying str to desthash")
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copy(dhash[:], str)
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} else {
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// invalid
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err = errors.New("invalid desthash format")
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log.WithField("str", str).Error("Invalid desthash format")
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}
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return
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}
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// get string representation of i2p dest hash(base32 version)
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func (h I2PDestHash) String() string {
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b32addr := make([]byte, 56)
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i2pB32enc.Encode(b32addr, h[:])
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return string(b32addr[:52]) + ".b32.i2p"
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}
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// get base64 representation of i2p dest sha256 hash(the 44-character one)
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func (h I2PDestHash) Hash() string {
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hash := sha256.New()
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hash.Write(h[:])
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digest := hash.Sum(nil)
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buf := make([]byte, 44)
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i2pB64enc.Encode(buf, digest)
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return string(buf)
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}
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// Returns "I2P"
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func (h I2PDestHash) Network() string {
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return "I2P"
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}
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