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Security Scol plugin
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Classes for the DSA signature algorithm. More...
Go to the source code of this file.
Enumerations | |
| enum | DSASignatureFormat { DSA_P1363 , DSA_DER , DSA_OPENPGP } |
| DSA Signature Format. More... | |
Functions | |
| size_t | DSAConvertSignatureFormat (byte *buffer, size_t bufferSize, DSASignatureFormat toFormat, const byte *signature, size_t signatureLen, DSASignatureFormat fromFormat) |
| Converts between signature encoding formats. | |
Classes for the DSA signature algorithm.
Definition in file dsa.h.
| enum DSASignatureFormat |
DSA Signature Format.
The DSA signature format used by Crypto++ is as defined by IEEE P1363. OpenSSL, Java and .Net use the DER format, and OpenPGP uses the OpenPGP format.
| Enumerator | |
|---|---|
| DSA_P1363 | Crypto++ native signature encoding format. |
| DSA_DER | signature encoding format used by OpenSSL, Java and .Net |
| DSA_OPENPGP | OpenPGP signature encoding format. |
| size_t DSAConvertSignatureFormat | ( | byte * | buffer, |
| size_t | bufferSize, | ||
| DSASignatureFormat | toFormat, | ||
| const byte * | signature, | ||
| size_t | signatureLen, | ||
| DSASignatureFormat | fromFormat | ||
| ) |
Converts between signature encoding formats.
| buffer | byte buffer for the converted signature encoding |
| bufferSize | the length of the converted signature encoding buffer |
| toFormat | the source signature format |
| signature | byte buffer for the existing signature encoding |
| signatureLen | the length of the existing signature encoding buffer |
| fromFormat | the source signature format |
This function converts between these formats, and returns length of signature in the target format. If toFormat == DSA_P1363, then bufferSize must equal publicKey.SignatureLength() or verifier.SignatureLength().
If the destination buffer is too small then the output of the encoded r and s will be truncated. Be sure to provide an adequately sized buffer and check the return value for the number of bytes written.
1.9.8