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20 lines
573 B
Go
20 lines
573 B
Go
package crypto
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// NewBlobBuffer returns a buffer that is large enough to hold a blob of size
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// plaintext bytes, including the crypto overhead.
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func NewBlobBuffer(size int) []byte {
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return make([]byte, size, size+Extension)
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}
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// PlaintextLength returns the plaintext length of a blob with ciphertextSize
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// bytes.
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func PlaintextLength(ciphertextSize int) int {
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return ciphertextSize - Extension
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}
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// CiphertextLength returns the encrypted length of a blob with plaintextSize
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// bytes.
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func CiphertextLength(plaintextSize int) int {
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return plaintextSize + Extension
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}
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