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/* $OpenBSD: b_print.c,v 1.25 2014/06/12 15:49:28 deraadt Exp $ */ |
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/* Theo de Raadt places this file in the public domain. */ |
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#include <openssl/bio.h> |
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int |
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BIO_printf(BIO *bio, const char *format, ...) |
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{ |
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va_list args; |
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int ret; |
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va_start(args, format); |
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ret = BIO_vprintf(bio, format, args); |
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va_end(args); |
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return (ret); |
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} |
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#ifdef HAVE_FUNOPEN |
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static int |
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_BIO_write(void *cookie, const char *buf, int nbytes) |
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{ |
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return BIO_write(cookie, buf, nbytes); |
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} |
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int |
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BIO_vprintf(BIO *bio, const char *format, va_list args) |
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{ |
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int ret; |
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FILE *fp; |
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fp = funopen(bio, NULL, &_BIO_write, NULL, NULL); |
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✗✓ |
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if (fp == NULL) { |
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ret = -1; |
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goto fail; |
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} |
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ret = vfprintf(fp, format, args); |
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fclose(fp); |
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fail: |
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return (ret); |
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} |
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#else /* !HAVE_FUNOPEN */ |
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int |
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BIO_vprintf(BIO *bio, const char *format, va_list args) |
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{ |
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int ret; |
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char *buf = NULL; |
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ret = vasprintf(&buf, format, args); |
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if (buf == NULL) { |
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ret = -1; |
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goto fail; |
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} |
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BIO_write(bio, buf, ret); |
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free(buf); |
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fail: |
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return (ret); |
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} |
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#endif /* HAVE_FUNOPEN */ |
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/* |
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* BIO_snprintf and BIO_vsnprintf return -1 for overflow, |
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* due to the history of this API. Justification: |
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* |
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* Traditional snprintf surfaced in 4.4BSD, and returned |
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* "number of bytes wanted". Solaris and Windows opted to |
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* return -1. A draft standard was written which returned -1. |
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* Due to the large volume of code already using the first |
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* semantics, the draft was repaired before standardization to |
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* specify "number of bytes wanted" plus "-1 for character conversion |
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* style errors". Solaris adapted to this rule, but Windows stuck |
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* with -1. |
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* |
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* Original OpenSSL comment which is full of lies: |
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* |
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* "In case of truncation, return -1 like traditional snprintf. |
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* (Current drafts for ISO/IEC 9899 say snprintf should return |
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* the number of characters that would have been written, |
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* had the buffer been large enough.)" |
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*/ |
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int |
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BIO_snprintf(char *buf, size_t n, const char *format, ...) |
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{ |
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va_list args; |
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int ret; |
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va_start(args, format); |
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ret = vsnprintf(buf, n, format, args); |
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va_end(args); |
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if (ret >= n || ret == -1) |
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return (-1); |
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return (ret); |
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} |
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int |
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BIO_vsnprintf(char *buf, size_t n, const char *format, va_list args) |
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{ |
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int ret; |
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ret = vsnprintf(buf, n, format, args); |
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if (ret >= n || ret == -1) |
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return (-1); |
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return (ret); |
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} |