41 lines
959 B
Go
41 lines
959 B
Go
package auth
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import (
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"crypto/subtle"
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"encoding/base64"
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"fmt"
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"strings"
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"golang.org/x/crypto/argon2"
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)
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func VerifyPassword(hashedPassword, password string) bool {
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// Parse the Argon2 hash format: $argon2id$v=19$m=65536,t=3,p=4$salt$hash
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parts := strings.Split(hashedPassword, "$")
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if len(parts) != 6 {
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return false
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}
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// Extract parameters
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var memory, time, threads uint32
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var version int
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fmt.Sscanf(parts[2], "v=%d", &version)
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fmt.Sscanf(parts[3], "m=%d,t=%d,p=%d", &memory, &time, &threads)
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salt, err := base64.RawStdEncoding.DecodeString(parts[4])
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if err != nil {
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return false
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}
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hash, err := base64.RawStdEncoding.DecodeString(parts[5])
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if err != nil {
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return false
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}
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// Generate hash with the same parameters
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derivedKey := argon2.IDKey([]byte(password), salt, time, memory, uint8(threads), uint32(len(hash)))
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// Compare hashes using constant time comparison
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return subtle.ConstantTimeCompare(hash, derivedKey) == 1
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}
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