45 lines
1.8 KiB
Go
45 lines
1.8 KiB
Go
package did
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import (
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"fmt"
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"github.com/MetaMask/go-did-it/crypto"
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)
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// TryAllVerifyBytes tries to verify the signature as bytes with all the methods in the slice.
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// It returns true if the signature is verified, and the method that verified it.
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// If no method verifies the signature, it returns false and nil.
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func TryAllVerifyBytes(methods []VerificationMethodSignature, data []byte, sig []byte, opts ...crypto.SigningOption) (bool, VerificationMethodSignature) {
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for _, method := range methods {
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if valid, err := method.VerifyBytes(data, sig, opts...); err == nil && valid {
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return true, method
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}
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}
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return false, nil
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}
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// TryAllVerifyASN1 tries to verify the signature as ASN.1 with all the methods in the slice.
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// It returns true if the signature is verified, and the method that verified it.
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// If no method verifies the signature, it returns false and nil.
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func TryAllVerifyASN1(methods []VerificationMethodSignature, data []byte, sig []byte, opts ...crypto.SigningOption) (bool, VerificationMethodSignature) {
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for _, method := range methods {
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if valid, err := method.VerifyASN1(data, sig, opts...); err == nil && valid {
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return true, method
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}
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}
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return false, nil
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}
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// FindMatchingKeyAgreement tries to find a matching key agreement method for the given private key type.
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// It returns the shared key as well as the selected method.
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// If no matching method is found, it returns an error.
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func FindMatchingKeyAgreement(methods []VerificationMethodKeyAgreement, priv crypto.PrivateKeyKeyExchange) ([]byte, VerificationMethodKeyAgreement, error) {
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for _, method := range methods {
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if method.PrivateKeyIsCompatible(priv) {
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key, err := method.KeyExchange(priv)
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return key, method, err
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}
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}
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return nil, nil, fmt.Errorf("no matching key agreement found")
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}
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