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30 lines
1.1 KiB
Go
30 lines
1.1 KiB
Go
package cryptutil // import "github.com/pomerium/pomerium/internal/cryptutil"
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import (
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"crypto/hmac"
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"crypto/sha512"
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"golang.org/x/crypto/bcrypt"
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)
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// Hash generates a hash of data using HMAC-SHA-512/256. The tag is intended to
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// be a natural-language string describing the purpose of the hash, such as
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// "hash file for lookup key" or "master secret to client secret". It serves
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// as an HMAC "key" and ensures that different purposes will have different
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// hash output. This function is NOT suitable for hashing passwords.
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func Hash(tag string, data []byte) []byte {
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h := hmac.New(sha512.New512_256, []byte(tag))
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h.Write(data)
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return h.Sum(nil)
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}
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// HashPassword generates a bcrypt hash of the password using work factor 14.
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func HashPassword(password []byte) ([]byte, error) {
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return bcrypt.GenerateFromPassword(password, 14)
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}
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// CheckPasswordHash securely compares a bcrypt hashed password with its possible
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// plaintext equivalent. Returns nil on success, or an error on failure.
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func CheckPasswordHash(hash, password []byte) error {
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return bcrypt.CompareHashAndPassword(hash, password)
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}
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