diff options
Diffstat (limited to 'libtomcrypt/src/misc/base64/base64_encode.c')
| -rw-r--r-- | libtomcrypt/src/misc/base64/base64_encode.c | 83 |
1 files changed, 63 insertions, 20 deletions
diff --git a/libtomcrypt/src/misc/base64/base64_encode.c b/libtomcrypt/src/misc/base64/base64_encode.c index 58a82df..5c26e60 100644 --- a/libtomcrypt/src/misc/base64/base64_encode.c +++ b/libtomcrypt/src/misc/base64/base64_encode.c @@ -5,32 +5,31 @@ * * The library is free for all purposes without any express * guarantee it works. - * - * Tom St Denis, tomstdenis@gmail.com, http://libtom.org */ #include "tomcrypt.h" /** @file base64_encode.c Compliant base64 encoder donated by Wayne Scott (wscott@bitmover.com) + base64 URL Safe variant (RFC 4648 section 5) by Karel Miko */ -#ifdef LTC_BASE64 +#if defined(LTC_BASE64) || defined (LTC_BASE64_URL) -static const char *codes = +#if defined(LTC_BASE64) +static const char * const codes_base64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; +#endif /* LTC_BASE64 */ -/** - base64 Encode a buffer (NUL terminated) - @param in The input buffer to encode - @param inlen The length of the input buffer - @param out [out] The destination of the base64 encoded data - @param outlen [in/out] The max size and resulting size - @return CRYPT_OK if successful -*/ -int base64_encode(const unsigned char *in, unsigned long inlen, - unsigned char *out, unsigned long *outlen) +#if defined(LTC_BASE64_URL) +static const char * const codes_base64url = +"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_"; +#endif /* LTC_BASE64_URL */ + +static int _base64_encode_internal(const unsigned char *in, unsigned long inlen, + unsigned char *out, unsigned long *outlen, + const char *codes, int pad) { unsigned long i, len2, leven; unsigned char *p; @@ -61,21 +60,65 @@ int base64_encode(const unsigned char *in, unsigned long inlen, *p++ = codes[(a >> 2) & 0x3F]; *p++ = codes[(((a & 3) << 4) + (b >> 4)) & 0x3F]; - *p++ = (i+1 < inlen) ? codes[(((b & 0xf) << 2)) & 0x3F] : '='; - *p++ = '='; + if (pad) { + *p++ = (i+1 < inlen) ? codes[(((b & 0xf) << 2)) & 0x3F] : '='; + *p++ = '='; + } + else { + if (i+1 < inlen) *p++ = codes[(((b & 0xf) << 2)) & 0x3F]; + } } /* append a NULL byte */ *p = '\0'; /* return ok */ - *outlen = p - out; + *outlen = (unsigned long)(p - out); return CRYPT_OK; } +#if defined(LTC_BASE64) +/** + base64 Encode a buffer (NUL terminated) + @param in The input buffer to encode + @param inlen The length of the input buffer + @param out [out] The destination of the base64 encoded data + @param outlen [in/out] The max size and resulting size + @return CRYPT_OK if successful +*/ +int base64_encode(const unsigned char *in, unsigned long inlen, + unsigned char *out, unsigned long *outlen) +{ + return _base64_encode_internal(in, inlen, out, outlen, codes_base64, 1); +} +#endif /* LTC_BASE64 */ + + +#if defined(LTC_BASE64_URL) +/** + base64 (URL Safe, RFC 4648 section 5) Encode a buffer (NUL terminated) + @param in The input buffer to encode + @param inlen The length of the input buffer + @param out [out] The destination of the base64 encoded data + @param outlen [in/out] The max size and resulting size + @return CRYPT_OK if successful +*/ +int base64url_encode(const unsigned char *in, unsigned long inlen, + unsigned char *out, unsigned long *outlen) +{ + return _base64_encode_internal(in, inlen, out, outlen, codes_base64url, 0); +} + +int base64url_strict_encode(const unsigned char *in, unsigned long inlen, + unsigned char *out, unsigned long *outlen) +{ + return _base64_encode_internal(in, inlen, out, outlen, codes_base64url, 1); +} +#endif /* LTC_BASE64_URL */ + #endif -/* $Source$ */ -/* $Revision$ */ -/* $Date$ */ +/* ref: $Format:%D$ */ +/* git commit: $Format:%H$ */ +/* commit time: $Format:%ai$ */ |