67 lines
2.1 KiB
C
67 lines
2.1 KiB
C
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#include <stdlib.h>
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#include <string.h>
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#include "mh/multihash.h"
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#include "mh/hashes.h"
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#include "libp2p/crypto/encoding/base58.h"
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#include "libp2p/crypto/sha256.h"
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/**
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* base58 encode a string NOTE: this also puts the prefix 'Qm' in front as the ID is a multihash
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* @param pointyaddr where the results will go
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* @param rezbuflen the length of the results buffer. It will also put how much was used here
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* @param ID_BUF the input text (usually a SHA256 hash)
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* @param ID_BUF_SIZE the input size (normally a SHA256, therefore 32 bytes)
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* @returns true(1) on success
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*/
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int PrettyID(unsigned char * pointyaddr, size_t* rezbuflen,unsigned char * ID_BUF, size_t ID_BUF_SIZE)//b58 encoded ID buf
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{
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int returnstatus = 0;
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unsigned char temp_buffer[*rezbuflen];
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memset(temp_buffer, 0, *rezbuflen);
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// wrap the base58 into a multihash
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int retVal = mh_new(temp_buffer, MH_H_SHA2_256, ID_BUF, ID_BUF_SIZE);
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if (retVal < 0)
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return 0;
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// base58 the multihash
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returnstatus = libp2p_crypto_encoding_base58_encode(temp_buffer, strlen((char*)temp_buffer), &pointyaddr, rezbuflen);
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if(returnstatus == 0)
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return 0;
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return 1;
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}
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/****
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* Make a SHA256 hash of what is usually the DER formatted private key.
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* @param result where to store the result. Should be 32 chars long
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* @param texttohash the text to hash
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* @param text_size the size of the text
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*/
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void ID_FromPK_non_null_terminated(char * result,unsigned char * texttohash, size_t text_size)
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{
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/* old way
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unsigned char hash[32];
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bzero(hash,32);
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SHA256_CTX ctx;
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sha256_init(&ctx);
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sha256_update(&ctx,texttohash,text_size);
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sha256_final(&ctx,hash);
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a_store_hash(result,hash);
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*/
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libp2p_crypto_hashing_sha256(texttohash, text_size, (unsigned char*)result);
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}
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/****
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* Make a SHA256 hash of what is usually the DER formatted private key.
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* @param result where to store the result. Should be 32 chars long
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* @param texttohash a null terminated string of the text to hash
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*/
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void ID_FromPK(char * result,unsigned char * texttohash)
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{
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ID_FromPK_non_null_terminated(result,texttohash,strlen((char*)texttohash));
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}
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